Anti-crack concrete for wharf surface layer and preparation method for anti-crack concrete for wharf surface layer
A technology of concrete and surface layer, which is applied in the field of anti-crack concrete for wharf surface layer and its preparation. It can solve the problems of too late cutting time, concrete damage, and failure to effectively inhibit crack expansion, etc., and achieve high crack resistance and good workability Effect
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[0108] Example 1
[0109] 1. Preparation of anti-cracking concrete for wharf surface:
[0110] The raw material components of the anti-cracking concrete of the wharf surface and their corresponding proportions are shown in Table 1-1. The raw materials used are as follows: the cement adopts the P.O42.5 cement produced by Shanghai Wan'an Enterprise Corporation; the second grade fly ash produced by the Shanghai Xinbao fly ash plant; the Shanghai Tongji Ark Special Building Materials Co., Ltd. Changjian The polypropylene fiber produced by the brand has a diameter of 18μm, a length of 12mm, and a modulus of elasticity of 3500MPa; the coarse aggregate adopts 5 to 31.5 continuous graded gravel (based on the total weight of the continuous graded gravel, which contains The mud content is less than 0.6%, and the needle-like crushed stone content is less than 7%); the fine aggregate adopts river sand with a fineness modulus greater than 2.6 and less than 3.0 (based on the total weight of the...
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[0134] Example 2
[0135] According to the preparation method of Example 1, the anti-cracking concrete of the wharf surface of this example was prepared, and the raw materials and the proportions are shown in Table 2-1.
[0136] Table 2-1 Raw material components and corresponding proportions of anti-cracking concrete for wharf surface
[0137]
[0138] After testing, the strength grade of the anti-cracking concrete of the wharf surface layer obtained in this embodiment reached C35, the slump of the concrete was 75mm, and the 1h slump loss was less than 10mm.
[0139] The crack-resistant concrete of the wharf surface obtained in this example has good workability, the concrete slump is 75mm; the test result of the concrete compressive strength is: the 28-day compressive strength is 43.1MPa; the result of plastic shrinkage of the concrete measured according to the plate test is No cracks appear; the measured 180-day drying shrinkage is 341×10 -6 ; The measured 28-day split tensile streng...
Example Embodiment
[0140] Example 3
[0141] According to the preparation method of Example 1, the anti-cracking concrete of the wharf surface of this example was prepared, and the raw materials and the proportions are shown in Table 3-1.
[0142] Table 3-1 Raw material components and corresponding proportions of anti-cracking concrete for wharf surface
[0143]
[0144] After testing, the strength grade of the anti-cracking concrete of the wharf surface layer obtained in this embodiment reached C35, the slump of the concrete was 75mm, and the 1h slump loss was less than 10mm.
[0145] The crack-resistant concrete of the wharf surface obtained in this example has good workability, the concrete slump is 75mm; the test result of the concrete compressive strength is: the 28-day compressive strength is 46.5MPa; the result of plastic shrinkage of the concrete measured according to the plate test is No cracks appear; the measured 180-day drying shrinkage is 385×10 -6 The measured 28-day split tensile strength...
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