NON-CALCINED CEMENTITIOUS COMPOSITIONS, NON-CALCINED CONCRETE COMPOSITIONS, NON-CALCINED CONCRETE AND PREPARATION METHODS THEREOF

Abstract

The present invention provides non-calcined cementitious compositions comprising micron inorganic particles, which can be used as a binder material; and provides non-calcined concrete compositions; non-calcined concretes are also provided, which exhibit similar or better physical and mechanical properties than those prepared with traditional cements do. The present invention also provides the preparation methods of the non-calcined cementitious compositions, the non-calcined concrete compositions and the non-calcined concretes.

Claims

1-14. (canceled)

15. A composition, comprising: (a) micron inorganic particles having a particle size ranging from 1.0 to 100 m of about 31% to 87% based on the total weight of the composition; (b) an aluminum-oxygen compound; (c) nanocolloidal silica, and (d) a coagulation controlling agent.

16. The composition according to claim 1, wherein the particle size distribution of the micron inorganic particles is at least bimodal.

17. The composition according to claim 1, wherein the micron inorganic particles have a trimodal particle size distribution, wherein the particles having a particle size or size range at the peak account for, independently from each other, at least 20% to 50% of the total weight of the micron inorganic particles.

18. The composition according to claim 1, wherein the nanocolloidal silica has a bimodal particle size distribution, wherein the particles having a particle size or size range at the peak account for, independently from each other, at least 30% to 70% of the total weight of the nanocolloidal silica.

19. The composition according to claim 1, further comprising at least one of a coagulation aid, active silica, and a water-reducing agent.

20. A composition, comprising (a) inorganic particles of about 66% to 92% based on the total weight of the composition; (b) an aluminum-oxygen compound; (c) nanocolloidal silica, and (d) a coagulation controlling agent, wherein the inorganic particles comprise micron inorganic particles having a particle size ranging from 1.0 to 100 m, and the micron inorganic particles account for 25% to 45% of the total weight of the inorganic particles.

21. The composition according to claim 6, wherein the particle size distribution of the micron inorganic particles is at least bimodal.

22. The composition according to claim 6, wherein the micron inorganic particles have a trimodal particle size distribution, wherein the particles having a particle size or size range at the peak account for, independently from each other, at least 20% to 50% of the total weight of the micron inorganic particles.

23. The composition according to claim 6, wherein the nanocolloidal silica has a bimodal particle size distribution, wherein the particles having a particle size or size range at the peak account for, independently from each other, at least 30% to 70% of the total weight of the nanocolloidal silica.

24. The composition according to claim 6, further comprising at least one of a coagulation aid, active silica, and a water-reducing agent.

25. A composition, comprising: (a) micron inorganic particles having a particle size ranging from 1.0 to 100 m of about 30% to 86% based on the total weight of the composition; (b) an aluminum-oxygen compound; (c) nanocolloidal silica; (d) a coagulation controlling agent; and (i) a coagulation aid, comprising an oxide, hydroxide, sulfate, or carbonate of an alkali metal or alkaline earth metal.

26. A composition, comprising: (a) inorganic particles of about 65% to 90% based on the total weight of the composition; (b) an aluminum-oxygen compound; (c) nanocolloidal silica; (d) a coagulation controlling agent; and (i) a coagulation aid, comprising an oxide, hydroxide, sulfate, or carbonate of an alkali metal or alkaline earth metal, wherein the inorganic particles comprise micron inorganic particles having a particle size ranging from 1.0 to 100 m, and the micron inorganic particles account for 25% to 45% of the total weight of the inorganic particles.

27. A concrete comprising a composition according to claim 1.

28. The concrete according to claim 13, having at least one of the following characteristics: a 28-day compressive strength of at least 1,800 psi as measured in accordance with CNS 1010 (ASTM C109) Standard or CNS 1232 (ASTM C39) Standard, a 28-day flexural strength of at least 200 psi as measured in accordance with CNS 1238 (ASTM C348) Standard, a 28-day splitting tensile strength of at least 200 psi as measured in accordance with CNS 3801 (ASTM C496) Standard, and a 28-day linear shrinkage of at most 1500 as measured in accordance with CNS 14603 (ASTM C157) Standard.

29. A concrete comprising a composition according to claim 6.

30. The concrete according to claim 15, having at least one of the following characteristics: a 28-day compressive strength of at least 1,800 psi as measured in accordance with CNS 1010 (ASTM C109) Standard or CNS 1232 (ASTM C39) Standard, a 28-day flexural strength of at least 200 psi as measured in accordance with CNS 1238 (ASTM C348) Standard, a 28-day splitting tensile strength of at least 200 psi as measured in accordance with CNS 3801 (ASTM C496) Standard, and a 28-day linear shrinkage of at most 1500, as measured in accordance with CNS 14603 (ASTM C157) Standard.

31. A concrete comprising a composition according to claim 11.

32. The concrete according to claim 17, having at least one of the following characteristics: a 28-day compressive strength of at least 1,800 psi as measured in accordance with CNS 1010 (ASTM C109) Standard or CNS 1232 (ASTM C39) Standard, a 28-day flexural strength of at least 200 psi as measured in accordance with CNS 1238 (ASTM C348) Standard, a 28-day splitting tensile strength of at least 200 psi as measured in accordance with CNS 3801 (ASTM C496) Standard, and a 28-day linear shrinkage of at most 1500 as measured in accordance with CNS 14603 (ASTM C157) Standard.

33. A concrete comprising a composition according to claim 12.

34. The concrete according to claim 19, having at least one of the following characteristics: a 28-day compressive strength of at least 1,800 psi as measured in accordance with CNS 1010 (ASTM C109) Standard or CNS 1232 (ASTM C39) Standard, a 28-day flexural strength of at least 200 psi as measured in accordance with CNS 1238 (ASTM C348) Standard, a 28-day splitting tensile strength of at least 200 psi as measured in accordance with CNS 3801 (ASTM C496) Standard, and a 28-day linear shrinkage of at most 1500 as measured in accordance with CNS 14603 (ASTM C157) Standard.

Description

EXAMPLES

Example 1

[0089] A non-calcined cementitious composition having components as listed in Table 1 below was prepared.

TABLE-US-00001 TABLE 1 Non-calcined cementitious composition (parts by weight) Raw material Aluminum- oxygen Nanocolloidal Coagulation Active Micron inorganic particles Coagulation compound/ silica controlling silica/ No. 1.6 m 10 m 50 m aid/content content content agent/content content 1A SiO.sub.2 Al.sub.2O.sub.3 12.1 Citric acid 27.8 8.8 2.2 2A SiO.sub.2 Al.sub.2O.sub.3 12.1 Citric acid 27.8 8.8 2.2 3A SiO.sub.2 Al.sub.2O.sub.3 12.1 Citric acid 27.8 8.8 2.2 4A SiO.sub.2 Al(OH).sub.3 12.1 Citric acid 27.8 8.8 2.2 5A SiO.sub.2 Al(OH).sub.3 12.1 Citric acid 27.8 8.8 2.2 6A SiO.sub.2 Al(OH).sub.3 12.1 Citric acid 27.8 8.8 2.2 7A SiO.sub.2 MgO High-alumina 12.2 Citric acid 28.1 2.2 cement 2.2 5.6 8A SiO.sub.2 MgO High-alumina 12.2 Citric acid/ 28.1 2.2 cement/ 2.2 5.6 9A SiO.sub.2 MgO High-alumina 12.2 Citric acid/ 28.1 2.2 cement/ 2.2 5.6 10A SiO.sub.2 SiO.sub.2 MgO High-alumina 12.2 Citric acid 18.3 9.8 2.2 cement 2.2 5.6 11A SiO.sub.2 SiO.sub.2 MgO High-alumina 12.2 Citric acid 18.3 9.8 2.2 cement 2.2 5.6 12A SiO.sub.2 SiO.sub.2 MgO High-alumina 12.2 Citric acid 18.3 9.8 2.2 cement 2.2 5.6 13A SiO.sub.2 SiO.sub.2 SiO.sub.2 MgO High-alumina 12.2 Citric acid 11.1 11.1 5.9 2.2 cement 2.2 5.6 14A SiO.sub.2 MgO Al.sub.2O.sub.3 11.8 Citric acid 27.2 2.2 8.6 2.2 15A SiO.sub.2 MgO Al.sub.2O.sub.3 11.8 Citric acid 27.2 2.2 8.6 2.2 16A SiO.sub.2 MgO Al.sub.2O.sub.3 11.8 Citric acid 27.2 2.2 8.6 2.2 17A SiO.sub.2 MgO Al(OH).sub.3 11.8 Citric acid 27.2 2.2 8.6 2.2 18A SiO.sub.2 MgO Al(OH).sub.3 11.8 Citric acid 27.2 2.2 8.6 2.2 19A SiO.sub.2 MgO Al(OH).sub.3 11.8 Citric acid 27.2 2.2 8.6 2.2 20A SiO.sub.2 SiO.sub.2 SiO.sub.2 MgO High-alumina 12.1 Citric acid 11.0 11.0 5.8 2.2 cement/Al(OH).sub.3 2.2 5.5/1.4 21A SiO.sub.2 SiO.sub.2 Al.sub.2O.sub.3 12.1 Citric acid 18.1 9.7 8.8 2.2 22A SiO.sub.2 SiO.sub.2 Al(OH).sub.3 12.1 Citric acid 18.1 9.7 8.8 2.2 23A SiO.sub.2 SiO.sub.2 SiO.sub.2 MgO High-alumina 11.8 Citric acid 10.7 10.7 5.7 2.1 cement/Al(OH).sub.3 2.1 5.4/3.6 24A SiO.sub.2 SiO.sub.2 SiO.sub.2 MgO High-alumina 11.9 Citric acid 10.8 10.8 5.7 2.2 cement/Al(OH).sub.3 2.2 5.4/2.7 25A SiO.sub.2 SiO.sub.2 SiO.sub.2 MgO High-alumina 11.7 Citric acid 10.6 10.6 5.6 2.1 cement/Al(OH).sub.3 2.1 5.3/4.4 26A SiO.sub.2 SiO.sub.2 SiO.sub.2 MgO High-alumina 12.1 Citric acid 11.0 10.0 5.8 2.2 cement/Al(OH).sub.3 2.2 5.5/2.2 27A SiO.sub.2 MgO High-alumina 12.2 Tartaric acid/ 28.1 2.2 cement 2.2 5.6 28A SiO.sub.2 SiO.sub.2 SiO.sub.2 MgO High-alumina 7 nm (Solid Citric acid 11.1 11.1 5.9 2.2 cement content 20%) 2.2 5.6 12.2 29A SiO.sub.2 SiO.sub.2 SiO.sub.2 MgO High-alumina 18 nm (Solid Citric acid 11.1 11.1 5.9 2.2 cement content 40%) 2.2 5.6 12.2 30A SiO.sub.2 SiO.sub.2 SiO.sub.2 MgO High-alumina 11 nm (Solid Citric acid 11.1 11.1 5.9 2.2 cement content30%) 2.2 5.6 12.2 31A SiO.sub.2 SiO.sub.2 SiO.sub.2 MgCO.sub.3 High-alumina 11.9 Citric acid 11.1 11.1 5.9 2.6 cement 2.6 5.6 32A SiO.sub.2 SiO.sub.2 SiO.sub.2 CaCO.sub.3 High-alumina 12.2 Citric acid 11.1 11.1 5.9 2.2 cement 2.2 5.6 33A SiO.sub.2 SiO.sub.2 MgO Al.sub.2O.sub.3 11.8 Citric acid 17.7 9.5 2.2 8.6 2.2 34A SiO.sub.2 SiO.sub.2 MgO Al(OH).sub.3 11.8 Citric acid 17.7 9.5 2.2 8.6 2.2 35A SiO.sub.2 SiO.sub.2 SiO.sub.2 High-alumina 12.2 Citric acid 8.1 12.0 6.3 cement 1.8 6.1 36A SiO.sub.2 SiO.sub.2 SiO.sub.2 MgO Al.sub.2O.sub.3/Al(OH).sub.3 12.1 Citric acid 11.0 10.0 5.8 2.2 5.5/2.2 2.2 400A SiO.sub.2 SiO.sub.2 SiO.sub.2 MgO High-alumina 11.9 Citric acid 8.0 11.8 6.3 2.1 cement 1.3 5.9 410A SiO.sub.2 SiO.sub.2 SiO.sub.2 MgO High-alumina 11.9 Citric acid 15 m/0.3 8.0 11.7 6.2 2.1 cement 1.8 5.9 411A SiO.sub.2 SiO.sub.2 SiO.sub.2 MgO High-alumina 11.9 Citric acid 15 m/0.5 7.9 11.7 6.2 2.3 cement 1.3 5.9 412A SiO.sub.2 SiO.sub.2 SiO.sub.2 MgO High-alumina 11.8 Citric acid 15 m/0.5 7.9 11.6 6.2 2.3 cement 1.9 5.8 413A SiO.sub.2 SiO.sub.2 SiO.sub.2 MgO High-alumina 11.8 Citric acid 15 m/0.5 7.9 11.7 6.2 2.0 cement 1.8 5.8 414A SiO.sub.2 SiO.sub.2 SiO.sub.2 MgO High-alumina 11.7 Citric acid 15 m/1.0 7.8 11.6 6.1 2.3 cement 1.8 5.8 415A SiO.sub.2 SiO.sub.2 SiO.sub.2 MgO High-alumina 11.7 Citric acid 15 m/2.0 7.8 11.5 6.1 2.3 cement 1.8 5.7 416A SiO.sub.2 SiO.sub.2 SiO.sub.2 MgO High-alumina 11.9 Citric acid 5~8 m/0.5 8.0 11.8 6.2 1.8 cement 1.3 5.9 4001A silicon carbide 18 m MgO High-alumina 10.0 Citric acid 15 m/0.4 27.0 1.5 cement 1.1 4.9 501A River River River MgO High-alumina 12.2 Citric acid sand sand sand 2.2 cement 2.2 11.1 11.1 5.9 5.6 502A River River MgO High-alumina 12.2 Citric acid sand sand 2.2 cement 2.2 19.4 8.7 5.6 503A River River MgO High-alumina 12.2 Citric acid sand sand 2.2 cement 2.2 19.4 8.7 5.6 504A River River River MgO High-alumina 12.2 Citric acid 15 m/0.4 sand sand sand 2.2 cement 2.2 11.1 11.1 5.9 5.5 505A River River MgO High-alumina 12.2 Citric acid 15 m/0.4 sand sand 2.2 cement 2.2 19.4 8.6 5.5 506A River River MgO High-alumina 12.2 Citric acid 15 m/0.4 sand sand 2.2 cement 2.2 19.4 8.6 5.5 601A SiO.sub.2 SiO.sub.2 SiO.sub.2 MgO High-alumina 11.9 Citric acid 15 m/0.5 7.9 11.7 6.2 2.3 cement 1.3 5.9 C1A SiO.sub.2 MgO 12.7 Citric acid (45 m) 2.2 1.1 27.7 C2A SiO.sub.2 SiO.sub.2 SiO.sub.2 MgO 11.6 8.0 11.8 (45 m) 1.8 6.2 Unless indicated otherwise, the nanocolloidal silica was prepared by mixing nanocolloidal silica with 18 nm and nanocolloidal silica with 80 nm at a ratio of about 8:2 (solid content: 40 wt. %).

[0090] A non-calcined cementitious composition having components as listed in Table 1A below was prepared.

TABLE-US-00002 TABLE 1A non-calcined cementitious composition (parts by weight) Raw material Micron inorganic Nanocolloidal Coagulation particles Coagulation Aluminum-oxygen silica controlling No. 1.6 m 10 m 45 m aid/content compound/content 80 nm 15 nm 10 nm agent/content 511A 0.3 6.0 8.4 512A 9.6 2.4 513A 7.2 4.8 514A 4.8 7.2 515A 2.4 9.6 516A 12.0 517A 12.0 518A 9.6 2.4 519A 7.2 4.8

[0091] In Examples 2 to 9 that follow, the compressive strength is tested in accordance with the CNS1010 (ASTM C109) Standard, except for the duration of testing the strength, which should be dominated by those listed herein.

Example 2

[0092] A non-calcined concrete composition having components as listed in the table below was prepared. The inorganic particles (aggregate) and the micron inorganic particles (SiO.sub.2) were mixed according to the weight ratio shown in Table 2, and then mixed uniformly with the aluminum-oxygen compound. Subsequently, the nanocolloidal silica and the coagulation controlling agent were added and the components were blended, and the compressive strength was measured after curing for 28 days.

TABLE-US-00003 TABLE 2 Raw material Species of Particle size of micron Species of coagulation 28-day inorganic particles aluminum-oxygen Nanocolloidal controlling strength No. Aggregate/content (SiO.sub.2)/content compound/content silica agent/content (psi) 1 Quartz sand 50 m Al.sub.2O.sub.3 12.1% Citric acid 2350 49.1% 27.8% 8.8% 2.2% 2 Quartz sand 10 m Al.sub.2O.sub.3 12.1% Citric acid 2125 49.1% 27.8% 8.8% 2.2% 3 Quartz sand 1.6 m Al.sub.2O.sub.3 12.1% Citric acid 2561 49.1% 27.8% 8.8% 2.2% 4 Quartz sand 50 m Al(OH).sub.3 12.1% Citric acid 3350 49.1% 27.8% 8.8% 2.2% 5 Quartz sand 10 m Al(OH).sub.3 12.1% Citric acid 3119 49.1% 27.8% 8.8% 2.2% 6 Quartz sand 1.6 m Al(OH).sub.3 12.1% Citric acid 3011 49.1% 27.8% 8.8% 2.2% 21 Quartz sand 1.6 m 50 m Al.sub.2O.sub.3 12.1% Citric acid 2063 49.1% 18.1% 9.7% 8.8% 2.2% 22 Quartz sand 1.6 m 50 m Al(OH).sub.3 12.1% Citric acid 2543 49.1% 18.1% 9.7% 8.8% 2.2% 35 Quartz sand 1.6 m 10 m 50 m High-alumina 12.2% Citric acid 4530 53.6% 8.1% 12.0% 6.3% cement 1.8% 6.1% The nanocolloidal silica was prepared by mixing nanocolloidal silica with 18 nm and nanocolloidal silica with 80 nm at a ratio of about 8:2 (solid content: 40 wt. %).

Example 3

[0093] A non-calcined concrete composition having components as listed in the table below was prepared. The inorganic particles (aggregate) and the micron inorganic particles (SiO.sub.2) were mixed according to the weight ratio shown in Table 3, and then mixed uniformly with the coagulation aid and the aluminum-oxygen compound. Subsequently, the nanocolloidal silica and the coagulation controlling agent were added and the components were blended, and the compressive strength was measured after curing for 14 or 28 days.

TABLE-US-00004 TABLE 3 Raw material Particle size of Species of micron inorganic Species of Species of coagulation 28-day particles coagulation aluminum-oxygen Nanocolloidal controlling strength No. Aggregate/content (SiO.sub.2)/content aid/content compound/content silica agent/content (psi) 7 Quartz sand 50 m/28.1% MgO High-alumina 12.2% Citric acid 5328 49.7% 2.2% cement 2.2% 5.6% 8 Quartz sand 10 m/28.1% MgO MgO High-alumina 12.2% Citric acid 6170 49.7% 2.2% cement 2.2% 5.6% 9 Quartz sand 1.6 m/28.1% MgO MgO High-alumina 12.2% Citric acid 4140* 49.7% 2.2% cement 2.2% 5.6% 14 Quartz sand 50 m/27.2% MgOMgO Al.sub.2O.sub.3 11.8% Citric acid 3520 48.0% 2.2% 8.6% 2.2% 15 Quartz sand 10 m/27.2% MgOMgO Al.sub.2O.sub.3 11.8% Citric acid 3105 48.0% 2.2% 8.6% 2.2% 16 Quartz sand 1.6 m/27.2% MgOMgO Al.sub.2O.sub.3 11.8% Citric acid 3866 48.0% 2.2% 8.6% 2.2% 17 Quartz sand 50 m/27.2% MgOMgO Al(OH).sub.3 11.8% Citric acid 4423 48.0% 2.2% 8.6% 2.2% 18 Quartz sand 10 m/27.2% MgOMgO Al(OH).sub.3 11.8% Citric acid 4322 48.0% 2.2% 8.6% 2.2% 19 Quartz sand 1.6 m/27.2% MgO MgO Al(OH).sub.3 11.8% Citric acid 4150 48.0% 2.2% 8.6% 2.2% 27 Quartz sand 10 m/28.1% MgOMgO High-alumina 12.2% tartaric acid 5945 49.7% 2.2% cement 2.2% 5.6% The nanocolloidal silica was prepared by mixing nanocolloidal silica with 18 nm and nanocolloidal silica with 80 nm at a ratio of about 8:2 (solid content: 40 wt. %). *The strength of No. 9 is 14-day strength.

Example 4

[0094] A non-calcined cementitious composition having components as listed in the table below was prepared. The micron inorganic particles (SiO.sub.2) as graded powders were formed by mixing in accordance with the particle sizes and percents by weight shown in Table 4. The inorganic particles (aggregate) were mixed with the graded powder, and then with the coagulation aid and the aluminum-oxygen compound uniformly. Subsequently, the nanocolloidal silica and the coagulation controlling agent were added and the components were blended, and the compressive strength was measured after curing for 28 days.

TABLE-US-00005 TABLE 4 Raw material Micron inorganic Particle size of particles Coagulation nanocolloidal Coagulation SiO.sub.2 SiO.sub.2 SiO.sub.2 aid/ Aluminum-oxygen silica/(Solid controlling 28-day No. Aggregate/content (1.6 m) (10 m) (50 m) content compound/content content)/content agent strenglh 10 Quartz sand 18.3% 9.8% MgO High-alumina 12.2% Citric acid 6360 49.7% 2.2% cement 2.2% 5.6% 11 Quartz sand 18.3% 9.8% MgO High-alumina 12.2% Citric acid 6716 49.7% 2.2% cement 2.2% 5.6% 12 Quartz sand 18.3% 9.8% MgO High-alumina 12.2% Citric acid 6822 49.7% 2.2% cement 2.2% 5.6% 13 Quartz sand 11.1% 11.1% 5.9% MgO High-alumina 12.2% Citric acid 8240 49.7% 2.2% cement 2.2% 5.6% 28 Quartz sand 11.1% 11.1% 5.9% MgO High-alumina 7 nm (20%) Citric acid 4603 49.7% 2.2% cement 12.2% 2.2% 5.6% 29 Quartz sand 11.1% 11.1% 5.9% MgO High-alumina 18 nm (40%) Citric acid 5698 49.7% 2.2% cement 12.2% 2.2% 5.6% 30 Quartz sand 11.1% 11.1% 5.9% MgO High-alumina 11 nm (30%) Citric acid 5374 49.7% 2.2% cement 12.2% 2.2% 5.6% 31 Quartz sand 11.1% 11.1% 5.9% MgCO.sub.3 High-alumina 11.9% Citric acid 4500 49.7% 2.1% cement 2.6% 5.6% 32 Quartz sand 11.1% 11.1% 5.9% CaCO.sub.3 High-alumina 12.2% Citric acid 5000 49.7% 2.2% cement 2.2% 5.6% Except for Nos. 28 to 30, the nanocolloidal silica was prepared by mixing nanocolloidal silica with 18 nm and nanocolloidal silica with 80 nm at a ratio of about 8:2 (solid content: 40 wt. %).

Example 5

[0095] A non-calcined cementitious composition having components as listed in the table below was prepared. The micron inorganic particles (SiO.sub.2) as graded powders were formed by mixing in accordance with the particle sizes and percents by weight shown in Table 5. The inorganic particles (aggregate) were mixed with the graded powder, and then with the coagulation aid and the aluminum-oxygen compound uniformly. Subsequently, the nanocolloidal silica and the coagulation controlling agent were added and the components were blended, and the compressive strength was measured after curing for 7 or 28 days.

TABLE-US-00006 TABLE 5 Raw material Micron inorganic particles Coagulation 28-day SiO.sub.2 SiO.sub.2 SiO.sub.2 Coagulation Aluminum-oxygen Nanocolloidal controlling strength No. Aggregate/content (1.6 m) (10 m) (50 m) aid/content compound/content silica/content agent/content (psi) 20 Quartz sand 11.0% 11.0% 5.8% MgO High-alumina 12.1% Citric acid 11343 * 49.0% 2.2% cement/Al(OH).sub.3 2.2% 5.5%/1.4% 23 Quartz sand 10.7% 10.7% 5.7% MgO High-alumina 11.8% Citric acid 12739 * 47.9% 2.1% cement/Al(OH).sub.3 2.1% 5.4%/3.6% 24 Quartz sand 10.8% 10.8% 5.7% MgO High-alumina 11.9% Citric acid 12936 * 48.3% 2.2% cement/Al(OH).sub.3 2.2% 5.4%/2.7% 25 Quartz sand 10.6% 10.6% 5.6% MgO High-alumina 11.7% Citric acid 14613 * 47.5% 2.1% cement/Al(OH).sub.3 2.1% 5.3%/4.4% 26 Quartz sand 11.0% 11.0% 5.8% MgO High-alumina 12.1% Citric acid 5160 ** 49.0% 2.2% cement/Al(OH).sub.3 2.2% 5.5%/2.2% 36 Quartz sand 11.0% 11.0% 5.8% MgO Al.sub.2O.sub.3/Al(OH).sub.3 12.1% Citric acid 3530 49.0% 2.2% 5.5%/2.2% 2.2% The nanocolloidal silica was prepared by mixing nanocolloidal silica with 18 nm and nanocolloidal silica with 80 nm at a ratio of about 8:2 (solid content: 40 wt. %). * The strength of Nos. 20 and 23 to 25 is 2-day strength at 180 C. ** The strength of No. 26 is 7-day strength.

Example 6

[0096] A non-calcined cementitious composition having components as listed in the table below was prepared. The micron inorganic particles (SiO.sub.2) as graded powders were formed by mixing in accordance with the particle sizes and percents by weight shown in Table 6. The inorganic particles (aggregate) were mixed with the graded powder, and then with the coagulation aid and the aluminum-oxygen compound uniformly. Subsequently, the nanocolloidal silica and the coagulation controlling agent (citric acid) were added and the components were blended, and the compressive strength was measured after curing for 10 or 28 days.

TABLE-US-00007 TABLE 6 Raw material Micron inorganic Aluminum- particles oxygen Coagulation Active 28-day Aggregate/ SiO.sub.2 SiO.sub.2 SiO.sub.2 Coagulation compound/ Nanocolloidal controlling silica/ strength No. content (1.6 m) (10 m) (45 m) aid/content content silica/content agent/content content (psi) 6460 (ponding) 8317 410 Quartz sand 8.0% 11.7% 6.2% MgO High-alumina 11.9% Citric 15 m/ 8906.8 53.0% 2.1% cement acid 0.3% 5.9% 1.8% 9696.8 (ponding) 12570.3 412 Quartz sand 7.9% 11.6% 6.2% MgO High-alumina 11.8% Citric 15 m/0.5% 9519.5 52.2% 2.3% cement acid 5.8% 1.9% 413 Quartz sand 7.9% 11.7% 6.2% MgO High-alumina 11.8% Citric 15 m/0.5% 8444.5 52.3% 2.0% cement acid 5.8% 1.8% 414 Quartz sand 7.8% 11.6% 6.1% MgO High-alumina 11.7% Citric 15 m/1.0% 7756* 51.9% 2.3% cement acid 5.8% 1.8% 415 Quartz sand 7.8% 11.5% 6.1% MgO High-alumina 11.7% Citric 15 m/2.0% 5631* 51.4% 2.3% cement acid 5.7% 1.8% 416 Quartz sand 8.0% 11.8% 6.2% MgO High-alumina 11.9% Citric 5~8 m/0.5% 8583.5 52.8% 1.8% cement acid 5.9% 1.3% 4001 silicon silicon carbide MgO High-alumina 10.0% Citric 15 m/0.4% 9016 carbide 18 m 27.0% 1.5% cement acid 0.7 mm 4.9% 1.1% 54.9% The nanocolloidal silica was prepared by mixing nanocolloidal silica with 18 nm and nanocolloidal silica with 80 nm at a ratio of about 8:2 (solid content: 40 wt. %). *The strength of Nos. 414 and 415 is 10-day strength.

Example 7

[0097] A non-calcined cementitious composition having components as listed in the table below was prepared. River sand was firstly ground, graded, and used as micron inorganic particles, with which graded powders were formed by mixing in accordance with the particle sizes and percents by weight shown in Table 7. The inorganic particles (aggregate) were mixed with the graded powder, and then with the coagulation aid and the aluminum-oxygen compound (high-alumina cement) uniformly. Subsequently, the nanocolloidal silica and the coagulation controlling agent (citric acid) were added and the components were blended, and the compressive strength was measured after curing for 28 days.

TABLE-US-00008 TABLE 7 Raw material Micron inorganic particles Aluminum- River River River oxygen Coagulation Active 28-day Aggregate/ sand sand sand Coagulation compound/ Nanocolloidal controlling silica/ strength No. content (1.6 m) (10 m) (50 m) aid/content content silica agent/content content (psi) 501 Quartz sand 11.1% 11.1% 5.9% MgO High-alumina 12.2% Citric acid 6700 49.7% 2.2% cement 2.2% 5.6% 502 Quartz sand 19.4% 8.7% MgO High-alumina 12.2% Citric acid 5200 49.7% 2.2% cement 2.2% 5.6% 503 Quartz sand 19.4% 8.7% MgO High-alumina 12.2% Citric acid 4800 49.7% 2.2% cement 2.2% 5.6% 504 Quartz sand 11.1% 11.1% 5.9% MgO High-alumina 12.2% Citric acid 15 m/0.4% 6000 49.5% 2.2% cement 2.2% 5.5% 505 Quartz sand 19.4% 8.6% MgO High-alumina 12.2% Citric acid 15 m/0.4% 4450 49.5% 2.2% cement 2.2% 5.5% 506 Quartz sand 19.4% 8.6% MgO High-alumina 12.2% Citric acid 15 m/0.4% 4600 49.5% 2.2% cement 2.2% 5.5% The nanocolloidal silica was prepared by mixing nanocolloidal silica with 18 nm and nanocolloidal silica with 80 nm at a ratio of about 8:2 (solid content: 40 wt. %).

[0098] It can be known from the test result that the readily available sand is also useful in the present invention.

Example 8

[0099] A non-calcium cementitious composition was prepared with 52.8 wt % of Quartz sand, 8.0 wt. % of 1.6 m SiO.sub.2, 11.8 wt. % of 10 m SiO.sub.2, 6.2 wt. % of 45 m SiO.sub.2, 5.9 wt. % of high-alumina cement, 1.8 wt. % of magnesium oxide, 1.3 wt. % of citric acid, and the nanocolloidal silica having different particle sizes in combination shown in Table 8. The micron inorganic particles (SiO.sub.2) as graded powders were formed by mixing. Then, the inorganic particles (aggregate) were mixed with the graded powders, and then with the coagulation aid (magnesium oxide) and the aluminum-oxygen compound (high-alumina cement) uniformly. Subsequently, the nanocolloidal silica (a single component or a combination of more than one component) and the coagulation controlling agent (citric acid) were added and the components were blended, and the compressive strength was measured after curing for 28 days.

TABLE-US-00009 TABLE 8 Raw material Nanocolloidal Nanocolloidal Nanocolloidal 28-day No. silica (80 nm) silica (15 nm) silica (10 nm) strength (psi) 511 0.3% 6.0% 8.4% 11000 512 9.6% 2.4% 8135 513 7.2% 4.8% 10648 514 4.8% 7.2% 12557 515 2.4% 9.6% 9660 516 12.0% 9908 517 12.0% 8674 518 9.6% 2.4% 9356 519 7.2% 4.8% 9589

Example 9

[0100] A concrete composition having components as listed in the table below was prepared. The aggregate and the micron inorganic particles (SiO.sub.2) were mixed according to the percents by weight shown in Table 9, and then mixed with the coagulation aid. Subsequently, the nanocolloidal silica and the coagulation controlling agent (citric acid) were added and the components were blended, and the compressive strength was measured after curing for 28 days.

TABLE-US-00010 TABLE 9 Raw material Micron inorganic Particle size of particles nanocolloidal Coagulation 28-day Aggregate/ SiO.sub.2 Coagulation Aluminum-oxygen silica (Solid controlling strength No. content (45 m) aid/content compound/content content)/content agent/content (psi) C1 Quartz sand 27.7% MgO No 7 nm (20%) 12.7% Citric acid <2000 56.3% 2.2% 1.1%

Example 10

[0101] A concrete composition having components as shown in Table 10 below was prepared.

TABLE-US-00011 TABLE 10 Raw material Micron inorganic Aluminum- Nanocolloidal Coagulation particles oxygen silica (Solid controlling Aggregate/ SiO.sub.2 SiO.sub.2 SiO.sub.2 Coagulation compound/ content)/ agent/ No. content (1.6 m) (10 m) (45 m) aid/content content content content C2 Quartz sand 8.0% 11.8% 6.2% MgO 18/80 nm 60.3% 1.8% (40%) 9.5%/2.4%

[0102] The composition sets into a block in a very short time, which is adverse to the application.

Example 11

[0103] A concrete was prepared with a non-calcined cementitious composition and a crude aggregate shown in Table 11 below.

TABLE-US-00012 TABLE 11 Raw material Micron inorganic particles Nanocolloidal Coagulation Active Crude SiO.sub.2 SiO.sub.2 SiO.sub.2 Coagulation Aluminum-oxygen silica (Solid controlling silica/ No. aggregate 1.6 m 10 m 45 m aid/content compound/content content)/content agent/content content 601 Gravel 7.9% 11.7% 6.2% MgO High-alumina 18/80 nm Citric acid 15 m/0.5% 52.3% 2.3% cement (40%) 1.3% 5.9% 9.5%/2.4%

[0104] The components were mixed and poured into a mold to prepare multiple concrete specimens, which were stood for 28 days and then tested for compressive strength of cylindrical concrete specimens according to CNS1232 (ASTM C39). The compressive strength is shown in Table 12 below.

TABLE-US-00013 TABLE 12 No. Compressive strength (psi) Average (psi) C01 6927 C02 6002 C03 6642

Example 12

[0105] The flexural strength of the concrete specimens prepared in Example 11 was measured in a flexural strength test of cylindrical concrete specimens according to CNS1238 (ASTM C348). The flexural strength is shown in Table 13 below.

TABLE-US-00014 TABLE 13 No. Flexural strength (psi) Average (psi) B01 688.4 B02 574.6

Example 13

[0106] The splitting tensile strength of the concrete specimens prepared in Example 11 was measured in a splitting tensile strength test of cylindrical concrete specimens according to CNS3801 (ASTM C496). The splitting tensile strength is shown in Table 14 below.

TABLE-US-00015 TABLE 14 No. Splitting tensile strength (psi) Average (psi) T01 533.3 T02 486.4 T03 381.2

[0107] It can be known from Examples 11 to 13 that the concrete prepared with the non-calcined cementitious composition or the non-calcined concrete composition of the present invention exhibits good physical and mechanical properties.

Example 14

[0108] The linear shrinkage of the concrete specimen (S01) prepared in Example 11 and the concrete specimen (R01) prepared with the commercial Portland cement and an aggregate was measured according to the CNS 14603 (ASTM C157) Standard. The linear shrinkage () is shown in Table 15 below.

TABLE-US-00016 TABLE 15 No. Day 1 Day 3 Day 5 Day 7 Day 28 R01 147 252 312 399 503 S01 52 120 132 176 176

[0109] It can be known from the test result that the concrete prepared with the non-calcined cementitious composition or the non-calcined concrete composition of the present invention is far better than the concrete prepared with the traditional Portland cement in terms of linear shrinkage.

[0110] The above-described embodiments of the present invention are intended to be illustrative only. Numerous alternative embodiments may be devised by persons skilled in the art without departing from the scope of the following claims.