Environmental cold-mix adjustable-modulus pavement material and manufacturing method thereof

Abstract

An environmental protection cold mixing type modulus-adjustable pavement material and preparation method thereof. Equal components of waterborne epoxy resin and waterborne curing agent are added in a container to obtain a waterborne epoxy resin mixture. Emulsified bitumen, the waterborne epoxy resin mixture, an emulsifying agent, a defoaming agent and a stabilizing agent are prepared according to a certain mass ratio; the emulsified bitumen is first added in the container, and the pH is regulated with hydrochloric acid to be 5.0 to 6.5; the above-mentioned other materials are added and stirred to make mixed liquid; a stator of a high-speed shearing machine is put into the mixed liquid, and the rotational speed is set as 350 to 500 rpm for about 20 to 40 min to obtain waterborne epoxy emulsified bituminous emulsion. B. Coarse aggregate, fine aggregate, fillers, cement and the waterborne epoxy emulsified bitumen obtained from the above-mentioned preparation are selected in proportion; and after the coarse aggregate, the fine aggregate and rubber powder are added in a stirring machine of asphalt mixture and stirred and the waterborne epoxy emulsified bitumen is added and stirred, the cement is added and stirred.

Claims

1. An environmental protection cold mixing modulus-adjustable pavement material, characterized by comprising the following mass ratios of materials: TABLE-US-00006 coarse aggregate: 100 fine aggregate: 60 to 80 fillers: 8 to 12 cement: 4 to 8 waterborne epoxy emulsified bitumen: 8 to 16 said waterborne epoxy emulsified bitumen comprises the following mass ratios of materials: TABLE-US-00007 emulsified bitumen 100 waterborne epoxy resin mixture 4 to 20 emulsifying agent 0.6 to 1.4 defoaming agent 0.1 to 0.6 stabilizing agent 0.6 to 2.0; said coarse aggregate is diorite, basalt, diabase, granite or limestone: said fine aggregate is diorite, basalt, diabase, granite or limestone; and said fillers are rubber powder; wherein the waterborne epoxy emulsified bitumen is prepared by: adding the emulsified bitumen in a container, and adjusting a pH with hydrochloric acid to be 5.0 to 6.5; mutually stirring and adding the waterborne epoxy resin mixture, the emulsifying agent, the defoaming agent and the stabilizing agent simultaneously, and mutually stirred continuously for 1 to 3 min until the mixed liquid is uniform; suitor of a high-speed shearing machine is put into the mixed liquid, and the rotational speed is set as 350 to 500 rpm; and a switch is enabled to perform shearing for about 20 to 40 min to obtain the waterborne epoxy emulsified bituminous emulsion; said coarse aggregate is diorite or basalt or diabase or granite or limestone, having a maximum nominal grain size of 26.5 mm; said fine aggregate is diorite or basalt or diabase or granite or limestone, having a maximum nominal grain size of 4.75 mm; said rubber powder is rubber powder of 40 to 80 meshes.

2. The environmental protection cold mixing modulus-adjustable pavement material of claim 1, characterized in that said defoaming agent is an ammonium salt cation surface active agent.

3. The environmental protection cold mixing modulus-adjustable pavement material of claim 1, characterized in that said stabilizing agent is polyvinyl alcohol or glycol.

4. A preparation method for the environmental protection cold mixing modulus-adjustable pavement material of claim 1, characterized by comprising the following steps: (a) preparation of the waterborne epoxy emulsified bitumen according to the mass ratio of waterborne epoxy resin to a waterborne curing agent=100:100; the waterborne epoxy resin and the waterborne curing agent are simultaneously added in a container, and manually stirred continuously for 2 to 4 min to obtain a waterborne epoxy resin mixture; according to the mass ratios: TABLE-US-00008 emulsified bitumen 100 the waterborne epoxy resin mixture 4 to 20 emulsifying agent 0.6 to 1.4 defoaming agent 0.1 to 0.6 stabilizing agent 0.6 to 2.0; the emulsified bitumen is firstly added in the container, and the pH is regulated with hydrochloric acid to be 5.0 to 6.5; and the waterborne epoxy resin mixture, the emulsifying agent, the defoaming agent and the stabilizing agent are mutually stirred and added simultaneously, and mutually stirred continuously for 1 to 3 min until the mixed liquid is uniform; a stator of a high-speed shearing machine is put into the mixed liquid, and the rotational speed is set at 350 to 500 rpm; and a switch is enabled to perform shearing for about 20 to 40 min to obtain the waterborne epoxy emulsified bitumen; (b) preparation of the environmental protection cold mixing modulus-adjustable pavement material according to the mass ratios: TABLE-US-00009 coarse aggregate 100 fine aggregate 60 to 80 cement 4 to 8 the waterborne epoxy emulsified bitumen 8 to 16 the coarse aggregate and the fine aggregate are added in a stirring machine and stirred for 60 to 90 s; stirring for 60 to 90 s after the waterborne epoxy emulsified bitumen is added; adding the cement and stirring for 60 to 90 s to obtain the environmental protection cold mixing modulus-adjustable pavement material.

5. The preparation method for the environmental protection cold mixing modulus-adjustable pavement material of claim 4, characterized in that said defoaming agent is an ammonium salt cation surface active agent; said stabilizing agent is polyvinyl alcohol or glycol; said coarse aggregate is diorite or basalt or diabase or granite or limestone, having a maximum nominal grain size of 26.5 mm; said fine aggregate is diorite or basalt or diabase or granite or limestone, having a maximum nominal grain size of 4.75 mm; and said rubber powder is rubber powder of 40 to 80 meshes.

Description

DETAILED DESCRIPTION OF THE PRESENT INVENTION

Embodiment 1

(1) 1) Preparation of the Waterborne Epoxy Emulsified Bitumen

(2) According to the mass ratio of waterborne epoxy resin to a waterborne curing agent=100:100, the waterborne epoxy resin and the waterborne curing agent are selected for standby. The waterborne epoxy resin and the waterborne curing agent are simultaneously added in a container, and manually stirred continuously for 2 min to obtain a waterborne epoxy resin mixture.

(3) According to the mass ratio of emulsified bitumen to the waterborne epoxy resin mixture to an emulsifying agent to a defoaming agent to a stabilizing agent=100:4:0.6:0.1:0.6, the emulsified bitumen and the waterborne epoxy resin mixture, the emulsifying agent, the defoaming agent and the stabilizing agent obtained from the above-mentioned preparation are selected for standby. The emulsified bitumen is first added in the container, and the pH is regulated with hydrochloric acid to be 5.0; and the waterborne epoxy resin mixture, the emulsifying agent, the defoaming agent and the stabilizing agent are mutually stirred and added simultaneously, and mutually stirred continuously for 1 min until the mixed liquid is uniform. A stator of a high-speed shearing machine is put into the mixed liquid, and the rotational speed is regulated as 350 rpm; and a switch is enabled to perform shearing for about 20 min to obtain waterborne epoxy emulsified bituminous emulsion. (Note: The storage time of the prepared emulsion shall not exceed 6 hrs)

(4) 2) Preparation of the Environmental Protection Cold Mixing Type Modulus-Adjustable Pavement Material

(5) According to the mass ratio of coarse aggregate to fine aggregate to fillers to cement to waterborne epoxy emulsified bitumen=100:60:8:4:8, the coarse aggregate, the fine aggregate, the fillers, the cement and the waterborne epoxy emulsified bitumen which is obtained from the above-mentioned preparation are selected for standby.

(6) The coarse aggregate, the fine aggregate and the rubber powder are added in a stirring machine of the bituminous mixture and stirred for 60 s. After the waterborne epoxy emulsified bitumen is added, it is stirred for 60 s. Finally, the cement is added and stirred for 60 s to obtain the environmental protection cold mixing type modulus-adjustable pavement material.

(7) The waterborne epoxy resin is waterborne epoxy resin GEM03 produced by Shanghai Lvjia Waterborne Coating Co., Ltd.

(8) The waterborne curing agent is waterborne curing agent GCA01 produced by Shanghai Lvjia Waterborne Coating Co., Ltd.

(9) The emulsified bitumen is cation medium-breaking emulsified bitumen produced by Tipco Asphalt (Public) Company Limited.

(10) The emulsifying agent is BH-Z2 type emulsifying agent or BH-MM type emulsifying agent.

(11) The defoaming agent is an ammonium salt cation surface active agent produced by Henan Daochun Chemical Technology Co., Ltd.

(12) The stabilizing agent is polyvinyl alcohol.

(13) The coarse aggregate is diorite, having a maximum nominal grain size of 26.5 mm.

(14) The fine aggregate is diorite, having a maximum nominal grain size of 4.75 mm.

(15) The rubber powder is rubber powder of 40 meshes.

(16) The cement is P.032.5 ordinary portland cement.

Embodiment 2

(17) 1) Preparation of the Waterborne Epoxy Emulsified Bitumen

(18) According to the mass ratio of waterborne epoxy resin to a waterborne curing agent=100:100, the waterborne epoxy resin and the waterborne curing agent are selected for standby. The waterborne epoxy resin and the waterborne curing agent are simultaneously added in a container, and manually stirred continuously for 3 min to obtain a waterborne epoxy resin mixture.

(19) According to the mass ratio of the emulsified bitumen to the waterborne epoxy resin mixture to an emulsifying agent to a defoaming agent to a stabilizing agent=100:8.0.9:0.2:0.9, the emulsified bitumen and the waterborne epoxy resin mixture, the emulsifying agent, the defoaming agent and the stabilizing agent obtained from the above-mentioned preparation are selected for standby. The emulsified bitumen is first added in the container, and the pH is regulated with hydrochloric acid to be 5.5; and the waterborne epoxy resin mixture, the emulsifying agent, the defoaming agent and the stabilizing agent are mutually stirred and added simultaneously, and mutually stirred continuously for 2 min until the mixed liquid is uniform. A stator of a high-speed shearing machine is put into the mixed liquid, and the rotational speed is regulated as 400 rpm; and a switch is enabled to perform shearing for about 25 min to obtain waterborne epoxy emulsified bituminous emulsion. (Note: The storage time of the prepared emulsion shall not exceed 6 h)

(20) 2) Preparation of the Environmental Protection Cold Mixing Type Modulus-Adjustable Pavement Material

(21) According to the mass ratio of coarse aggregate to fine aggregate to fillers to cement to waterborne epoxy emulsified bitumen=100.65:9:5:10, the coarse aggregate, the fine aggregate, the fillers, the cement and the waterborne epoxy emulsified bitumen which is obtained from the above-mentioned preparation are selected for standby.

(22) The coarse aggregate, the fine aggregate and the rubber powder are added in a stirring machine of the bituminous mixture and stirred for 60 s. After the waterborne epoxy emulsified bitumen is added, it is stirred for 60 s. Finally, the cement is added and stirred for 60 s to obtain the environmental protection cold mixing type modulus-adjustable pavement material.

(23) The waterborne epoxy resin is waterborne epoxy resin GEM02 produced by Shanghai Lvjia Waterborne Coating Co., Ltd.

(24) The waterborne curing agent is waterborne curing agent GCA02 produced by Shanghai Lvjia Waterborne Coating Co., Ltd

(25) The emulsified bitumen is cation medium-breaking emulsified bitumen produced by Tipco Asphalt (Public) Company Limited.

(26) The emulsifying agent is BH-Z2 type emulsifying agent or BH-MM type emulsifying agent.

(27) The defoaming agent is an ammonium salt cation surface active agent produced by Henan Daochun Chemical Technology Co., Ltd.

(28) The stabilizing agent is polyvinyl alcohol.

(29) The coarse aggregate is diabase, having a maximum nominal grain size of 26.5 mm.

(30) The fine aggregate is diabase, having a maximum nominal grain size of 4.75 mm.

(31) The rubber powder is rubber powder of 50 meshes.

(32) The cement is P.042.5 ordinary portland cement.

Embodiment 3

(33) 1) Preparation of the Waterborne Epoxy Emulsified Bitumen

(34) According to the mass ratio of waterborne epoxy resin to a waterborne curing agent=100:100, the waterborne epoxy resin and the waterborne curing agent are selected for standby. The waterborne epoxy resin and the waterborne curing agent are simultaneously added in a container, and manually stirred continuously for 3 min to obtain a waterborne epoxy resin mixture.

(35) According to the mass ratio of emulsified bitumen to the waterborne epoxy resin mixture to an emulsifying agent to a defoaming agent to a stabilizing agent=100:12:1.0:0.4:1.3, the emulsified bitumen and the waterborne epoxy resin mixture, the emulsifying agent, the defoaming agent and the stabilizing agent obtained from the above-mentioned preparation are selected for standby. The emulsified bitumen is first added in the container, and the pH is regulated with hydrochloric acid to be 6.0; and the waterborne epoxy resin mixture, the emulsifying agent, the defoaming agent and the stabilizing agent are mutually stirred and added simultaneously, and mutually stirred continuously for 2 min until the mixed liquid is uniform. A stator of a high-speed shearing machine is put into the mixed liquid, and the rotational speed is regulated as 350 rpm, and a switch is enabled to perform shearing for about 30 min to obtain waterborne epoxy emulsified bituminous emulsion. (Note: The storage time of the prepared emulsion shall not exceed 6 hrs)

(36) 2) Preparation of the Environmental Protection Cold Mixing Type Modulus-Adjustable Pavement Material

(37) According to the mass ratio of coarse aggregate to fine aggregate to fillers to cement to waterborne epoxy emulsified bitumen=100:75:10:7:13, the coarse aggregate, the fine aggregate, the fillers, the cement and the waterborne epoxy emulsified bitumen which is obtained from the above-mentioned preparation are selected for standby.

(38) The coarse aggregate, the fine aggregate and the rubber powder are added in a stirring machine of the bituminous mixture and stirred for 80 s. After the waterborne epoxy emulsified bitumen is added, it is stirred for 80 s. Finally, the cement is added and stirred for 80 s to obtain the environmental protection cold mixing type modulus-adjustable pavement material.

(39) The waterborne epoxy resin is waterborne epoxy resin HTW-608 produced by Suzhou Sirgel Specialty Resins Co., Ltd.

(40) The waterborne curing agent is waterborne curing agent HTW-208 produced by Suzhou Sirgel Specialty Resins Co., Ltd.

(41) The emulsified bitumen is cation slow-breaking emulsified bitumen produced by Tipco Asphalt (Public) Company Limited.

(42) The emulsifying agent is BH-MM type emulsifying agent.

(43) The defoaming agent is an ammonium salt cation surface active agent produced by Henan Daochun Chemical Technology Co., Ltd.

(44) The stabilizing agent is glycol.

(45) The coarse aggregate is basalt, having a maximum nominal grain size of 26.5 mm.

(46) The fine aggregate is basalt, having a maximum nominal grain size of 4.75 mm.

(47) The rubber powder is rubber powder of 60 meshes.

(48) The cement is P.042.5 ordinary portland cement.

Embodiment 4

(49) 1) Preparation of the Waterborne Epoxy Emulsified Bitumen

(50) According to the mass ratio of waterborne epoxy resin to a waterborne curing agent=100:100, the waterborne epoxy resin and the waterborne curing agent are selected for standby. The waterborne epoxy resin and the waterborne curing agent are simultaneously added in a container, and manually stirred continuously for 4 min to obtain a waterborne epoxy resin mixture.

(51) According to the mass ratio of emulsified bitumen to the waterborne epoxy resin mixture to an emulsifying agent to a defoaming agent to a stabilizing agent=100:20:1.4:0.6:2.0, the emulsified bitumen and the waterborne epoxy resin mixture, the emulsifying agent, the defoaming agent and the stabilizing agent obtained from the above-mentioned preparation are selected for standby. The emulsified bitumen is first added in the container, and the pH is regulated with hydrochloric acid to be 6.5; and the waterborne epoxy resin mixture, the emulsifying agent, the defoaming agent and the stabilizing agent are mutually stirred and added simultaneously, and continuously mutually stirred for 3 min until the mixed liquid is uniform. A stator of a high-speed shearing machine is put into the mixed liquid, and the rotational speed is regulated as 500 rpm; and a switch is enabled to perform shearing for about 40 min to obtain waterborne epoxy emulsified bituminous emulsion. (Note: The storage time of the prepared emulsion shall not exceed 6 h)

(52) 2) Preparation of the Environmental Protection Cold Mixing Type Modulus-Adjustable Pavement Material

(53) According to the mass ratio of coarse aggregate to fine aggregate to fillers to cement to waterborne epoxy emulsified bitumen=100:80:12:8:16, the coarse aggregate, the fine aggregate, the fillers, the cement and the waterborne epoxy emulsified bitumen which is obtained from the above-mentioned preparation are selected for standby.

(54) The coarse aggregate, the fine aggregate and the rubber powder are added in a stirring machine of the bituminous mixture and stirred for 90 s. After the waterborne epoxy emulsified bitumen is added, it is stirred for 90 s. Finally, the cement is added and stirred for 90 s to obtain the environmental protection cold mixing type modulus-adjustable pavement material.

(55) The waterborne epoxy resin is waterborne epoxy resin HTW-609 produced by Suzhou Sirgel Specialty Resins Co., Ltd.

(56) The waterborne curing agent is waterborne curing agent HTW-208 produced by Suzhou Sirgel Specialty Resins Co., Ltd.

(57) The emulsified bitumen is cation slow-breaking emulsified bitumen produced by Tipco Asphalt (Public) Company Limited.

(58) The emulsifying agent is BH-MM type emulsifying agent.

(59) The defoaming agent is an ammonium salt cation surface active agent produced by Henan Daochun Chemical Technology Co., Ltd.

(60) The stabilizing agent is glycol.

(61) The coarse aggregate is granite, having a maximum nominal grain size of 26.5 mm.

(62) The fine aggregate is granite, having a maximum nominal grain size of 4.75 mm.

(63) The rubber powder is rubber powder of 80 meshes.

(64) The cement is P.042.5 ordinary portland cement.

(65) Refer to the following standards for the performance tests of all parameters of the cold mixing type modulus-adjustable pavement materials prepared and obtained by embodiment 1 to embodiment 4, and see Table 1 for parameter values:

(66) {circle around (1)} Rut test, for respectively testing dynamic stability at 60 C. and 70 C.: Standard Test Methods of Bitumen and Bituminous Mixtures for Highway Engineering JTG E20-2011 (T0719-2011);

(67) {circle around (2)} Water stability test, for testing residual immersion Marshall stability and freezing-thawing split strength ratio: Standard Test Methods of Bitumen and Bituminous Mixtures for Highway Engineering JTG E20-2011 (T0709-2011, T0729-2000);

(68) {circle around (3)} Low-temperature bending test, for testing the ultimate bending strain at 10 C.: Standard Test Methods of Bitumen and Bituminous Mixtures for Highway Engineering JTG E20-2011 (T 0715-2011);

(69) {circle around (4)} Shear Strength: A uniaxial penetration test from Bi Yufeng of Tongji University is adopted. Test conditions: {circle around (1)} sample molding: 100 mm100 mm; {circle around (2)} test temperature: 60 C.; keeping the temperature for 6 h; {circle around (3)} loading rate: 1 mm/min.

(70) {circle around (5)} Static Resilient Modulus: Standard Test Methods of Bitumen and Bituminous Mixtures for Highway Engineering JTG E20-2011 (T 0713-2000)

(71) TABLE-US-00005 TABLE 1 Performance Tests of Embodiments Performance Embodi- Embodi- Embodi- Embodi- Parameters ment 1 ment 2 ment 3 ment 4 Dynamic stability at 1236 1504 1730 1896 60 C. (times/mm) Dynamic stability at 7264 9011 10058 12324 70 C. (times/mm) Residual immersion 92.6% 94.2% 94.6% 94.5% Marshall stability Freezing-thawing split 90.9% 91.8% 92.4% 93.0% strength ratio Bending strain at 10 C. 2506 2636 2718 2701 () Shear strength (MPa) 1.28 1.38 1.42 1.45 Static resilient modulus 2200 2535 2966 3567 (MPa)

(72) The present invention can be realized by all raw materials listed by the present invention, and the embodiments will not be individually listed herein. The present invention can be realized by upper and lower limits and values of range of all the raw materials and upper and lower limits of technological parameters (such as time, pH and the like), and the embodiments will not be individually listed herein.