Baseless modified asphalt waterproofing coiled material based on basalt fiber

Abstract

A baseless modified asphalt waterproofing coiled material based on basalt fiber is provided by the present application, including a composition coated on a surface of a coiled material; according to 100 parts by weight, the composition includes: 40-45 parts of asphalt, 15-20 parts of softening oil, 4.5-5.5 parts of high-temperature tackifier, 3.5-4 parts of basalt fiber chopped filament and 27-33 parts of filler.

Claims

1. A baseless modified asphalt waterproofing coiled material based on basalt fiber, comprising a composition coated on a surface of a coiled material; the composition comprises, according to 100 parts by weight, 40-45 parts of asphalt, 15-20 parts of softening oil, 4.5-5.5 parts of high-temperature tackifier, 3.5-4 parts of basalt fiber chopped filament and 27-33 parts of filler; the high-temperature tackifier is prepared by compounding SBS and SBR according to a mass ratio of 1:0.2-0.5; the basalt fiber chopped filament is continuous basalt fiber precursor chopped to 1-2 μm, with chopped precursor coated with a silane impregnating agent on a surface; and a preparation method of the baseless modified asphalt waterproofing coiled material comprises following steps: 1) Weighing the asphalt and the softening oil, heating and melting, followed by mixing and stirring, and heating to a temperature of 180° C.-190° C. while stirring; 2) Keeping the temperature between 180° C. and 190° C., slowly adding the high-temperature tackifier, stirring to avoid overflow caused by melting expansion, and continuing stirring until materials are completely melted, then carrying out a next step; 3) Adding the chopped precursor of basalt fiber chopped filament, then maintaining a temperature of 170° C.-180° C., and continuing stirring; and 4) Adding the filler, then stirring at 160° C.-165° C., and discharging materials to obtain the composition; the composition forms a membrane adhering to the surface of the coiled material, with a membrane thickness of 1.2-2.0 mm; the coiled material obtained is easy to uncoil when being uncoiled at 45° C., and the coiled material is flat without obvious bending after uncoiling.

2. The baseless modified asphalt waterproofing coiled material based on basalt fiber according to claim 1, wherein in the step 1), a stirring speed is 200-300 r/min.

3. The baseless modified asphalt waterproofing coiled material based on basalt fiber according to claim 1, wherein in the step 2), a stirring speed is 400-600 r/min.

4. The baseless modified asphalt waterproofing coiled material based on basalt fiber according to claim 1, wherein in the step 3), the stirring is carried out at a stirring speed of 400-600 r/min for 45-60 minutes.

5. The baseless modified asphalt waterproofing coiled material based on basalt fiber according to claim 1, wherein in the step 4), the stirring is carried out at 200-300 r/min for 30-45 minutes.

6. The baseless modified asphalt waterproofing coiled material based on basalt fiber according to claim 1, wherein the filler is heavy calcium carbonate with a mesh number of 120-150.

Description

DETAILED DESCRIPTION OF THE EMBODIMENTS

(1) In order to make the objectives, technical schemes and advantages of the embodiments of the present application clearer, the technical schemes in the embodiment of the present application are described clearly and completely in combination with the specific embodiments of the present application. Obviously, the described embodiments are a part of the embodiments of the present application, but not the whole embodiments. The components of the embodiments of the present application generally described herein may be arranged and designed in a variety of different configurations.

(2) Therefore, the following detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work belong to the scope of protection of the present application.

(3) The technical means not detailed in this application and not used to solve the technical problems in this application are all set according to the common knowledge in the field, and may be realized by various common knowledge setting methods.

EMBODIMENTS

(4) Unless otherwise specified, the materials and instruments used in the following embodiments are all commercially available.

Embodiments 1-3

(5) The materials added in Embodiments 1 to 3 are added as shown in Table 1 and Table 2 below.

(6) TABLE-US-00001 TABLE 1 (in parts by weight) 120-mesh High- heavy S/N of Softening temperature Basalt calcium projects Asphalt oil tackifier fiber powder Embodiment 45 15 5 3.5 31.5 1 Embodiment 40 20 4.5 4 31.5 2 Embodiment 40 20 5.5 4 30.5 3

(7) TABLE-US-00002 TABLE 2 (in parts by weight) S/N of projects SBS SBR Embodiment 1 1 0.2 Embodiment 2 1 0.4 Embodiment 3 1 0.5

(8) The preparation method in Embodiments 1 to 3 are carried out according to the following steps: 1) the required asphalt and softening oil are weighed according to the production formula, heated and melted, then the stirring is started, and the stirring is continued while heating; 2) the high-temperature tackifier is added slowly, with stirring and avoiding spillage caused by melting, the temperature is maintained and stirring is continued until the melting is complete and the next step is carried out; 3) the basalt fiber is added, then the temperature is maintained and the stirring is continued; and 4) the filler is added according to the requirements of the formula, followed by heat preservation and mixing, and then the material is discharged.

(9) The processing parameters in the preparation method in Embodiments 1 to 3 are illustrated in the following table:

(10) TABLE-US-00003 S/N of embodi- ments step 1) step 2) step 3) step 4) 1 185° C., 185° C.; 175° C.; stirring stirring at stirring speed stirring speed speed of 500 162° C. of 250 r/min. of 500 r/min. r/min, 50 min. for 35 min. 2 180° C., 190° C.; 180° C.; stirring stirring at stirring speed stirring speed speed of 165° C. of 200 r/min. of 600 r/min. 600 r/min, for 30 min. 45 min. 3 190° C., 180° C.; 170° C.; stirring stirring at stirring speed stirring speed speed of 400 160° C. for of 300 r/min. of 400 r/min. r/min, 60 min. 45 min.

Comparative Embodiment 1

(11) The difference from Embodiment 1 is that the high-temperature tackifier and the basalt fiber chopped filament are not used.

Comparative Embodiment 2

(12) The difference of the present comparative embodiment from the Embodiment 1 is that a stabilizer is formulated according to the stabilizer disclosed in CN113604064A and then added to the composition obtained, and a baseless waterproofing coiled material is prepared.

(13) The sample of coiled material obtained in Embodiment 1 is examined, and the results obtained are shown in Table 3 below. The results obtained from Embodiments 2 to 3 are similar to Embodiment 1 and will not be repeated here. Methods of detection are in accordance with the public method of GB 23441-2009 “Self-adhering polymer modified bituminous waterproof sheet”.

(14) TABLE-US-00004 TABLE 3 Performance test data Tested Technical values of index of Comparative Comparative S/N of Embodiment national embodiment embodiment Test items Test items 1 standard 1 2 1 Tension/(N/50 mm) 385 ≥150 135 173 2 Elongation at maximum 479 ≥200 356 387 tension/% 3 Asphalt elongation at 536 ≥250 402 436 break/% 4 Tear strength of nail shaft/N 156 ≥60 sixty-eight 70 5 Heat resistance, sliding at No sliding at Sliding at Slide by 0.8 No sliding at 70° C. shall not exceed 2 mm 85° C. 70° C. shall mm at 70° C. 70° C. not exceed 2 mm 6 low temperature flexibility No crack at No crack at No crack at No crack at −20° C. −20° C. −20° C. −20° C. 7 Peel strength Coiled 5.4 ≥1.0 1.3 1.6 (N/mm) material and coiled material 8 Coiled 5.3 ≥1.5 1.8 2.0 material and aluminum plate 9 Oil permeability/sheet number 1 ≤2 sheets 1 1 10 Stickiness/min >60 min ≥20 45 min >60 min 11 Thermostability Exterior No bulging, No bulging, Slight slip No bulging, wrinkling, wrinkling, wrinkling, sliding and sliding and sliding and flowing. flowing. flowing. Size 0.4 2 2.3 1.8 change/% ≤

(15) It can be seen from Table 3 that the performance of the baseless modified asphalt waterproofing coiled material based on high-performance basalt fiber prepared by the method provided by this application can meet the standard of performance testing, and obviously exceeds the requirements of the national standard in terms of tensile properties (tensile force and elongation), nail rod tearing strength, heat resistance, heat stability and other aspects, and has greater performance enhancement in comparison with existing baseless products, narrowing the difference between baseless and based products in terms of strength, enabling the baseless products to be improved and enhanced in the aspects of resistance to deformation, tearing, etc.

(16) Moreover, by using this method to produce baseless products, the dosing process is comparatively simpler and the process is more optimized, making it possible to shorten the dosing duration and reduce energy consumption.

(17) Construction Test

(18) The samples obtained in Embodiment 1 and Comparative embodiments 1-2 are applied in construction according to the requirements of national standards, and the results are shown in the following table.

(19) TABLE-US-00005 TABLE 4 Bonding Bonding condition of effect S/N Uncoiling at 45° C. base layer (N/mm) Embodi- Easy to uncoil, and after Full 2.7 ment 1 uncoiling, the coil is flat viscosity without obvious bending. Com- Uncoiling is a little difficult, and Good 1.3 parative the coil is not upright. After adhesion embodi- uncoiling, the core of coiled ment 1 material is obviously wrinkled. Com- Uncoiling is a little difficult, and Full 1.8 parative the coil is not upright. After viscosity embodi- uncoiling, the core of coiled ment 2 material is obviously wrinkled.

(20) It can be seen from Table 4 that the baseless modified asphalt waterproofing coiled material based on high-performance basalt fiber prepared by the formula provided in this application improves the verticality and appearance quality of baseless asphalt coiled material. The basalt fiber is fused with the asphalt after being added, and the strength of the composition is enhanced, which alleviates and reduces the common problem of large wrinkle area at the core position after unrolling of baseless asphalt coiled materials.

(21) Upon adopting the asphalt coiled material provided by this application and the existing method of construction, the wrinkles at the core of the coiled material are easily paved, and after construction, the region exists no obvious traces of bending; after paving construction, there is no gap between the coiled material and the substrate, and the waterproofing effect is greatly improved.

(22) Furthermore, the basalt fiber offers excellent chemical resistance, especially with the advantage of alkali resistance, and therefore is capable of improving the high-temperature stability, low-temperature crack resistance and fatigue resistance of asphalt and concrete.

(23) Although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still possible to make modifications to the technical schemes recorded in the foregoing embodiments or to make equivalent replacements for some of the technical features therein, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.