Anti-crack concrete mixture and preparation method thereof
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A mixture and concrete technology, applied in the field of concrete, can solve problems affecting normal use, concrete cracking, etc., and achieve the effects of improving large drying shrinkage deformation, high bonding strength, and improving dispersion uniformity
Active Publication Date: 2021-01-29
上海百基混凝土有限公司
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Problems solved by technology
However, during the use of concrete, the concrete is prone to cracking, which seriously affects the normal use.
Method used
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Embodiment 1
[0044] Embodiment 1: A kind of anti-cracking concrete mixture, each component and its corresponding parts by weight are shown in Table 1, and are prepared through the following steps:
[0045] S1, fully mixing cement, sand, fine stone, silica fume and graphene-modified polypropylene fibers to form a mixture;
[0046] S2, adding the water reducer to water to form a mixed solution;
[0047] S3, adding the mixed solution into the mixture, and continuously stirring and mixing to obtain the crack-resistant concrete mixture.
[0048] Wherein the graphene modified polypropylene fiber is prepared by the following steps:
[0049] a, put polypropylene resin, graphene, octadecyl isocyanate, and polyvinylpyrrolidone into a ball mill at a weight ratio of 1:0.01:5:0.02, and perform ball milling for 2 hours at a speed of 280 rpm, and then add it to bis In the screw extruder, the temperature of the five stages from the feeding port to the machine head is set to 160°C, 175°C, 180°C, 180°C, 1...
Embodiment 2-6
[0051] Example 2-6: A crack-resistant concrete mixture, the difference from Example 1 is that each component and its corresponding parts by weight are shown in Table 1.
[0052] Each component and its weight (kg) in table 1 embodiment 1-6
[0053]
Embodiment 7
[0054]Embodiment 7: a kind of anti-cracking concrete mixture, the difference with embodiment 4 is, when preparing graphene modified polypropylene fiber, polypropylene resin, graphene, octadecyl isocyanate and polyvinylpyrrolidone The weight ratio is controlled at 1:0.05:10:0.1.
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Abstract
The invention relates to the technical field of concrete, in particular to an anti-crack concrete mixture and a preparation method thereof, and the anti-crack concrete mixture comprises the followingcomponents in parts by weight: 200-300 parts of cement; 800-900 parts of sand; 900-1200 parts of fine stone; 200-300 parts of water; 200-300 parts of silica fume; 5-7 parts of a water reducing agent;and 30-50 parts of graphene modified polypropylene fiber. The preparation method comprises the following steps: S1, fully mixing the cement, the sand, the fine stone, the silicon powder and the graphene modified polypropylene fiber to form a mixture; S2, adding a water reducing agent into water to form a mixed solution; and S3, adding the mixed solution into the mixture, and continuously stirringand mixing to obtain the anti-crack concrete mixture. The anti-crack concrete prepared by the invention has good anti-crack capability.
Description
technical field [0001] The present application relates to the technical field of concrete, in particular to a crack-resistant concrete mixture and a preparation method thereof. Background technique [0002] Concrete refers to the artificial stone made of cement as the main cementitious material, mixed with water, sand, stones, chemical admixtures and mineral admixtures when necessary, mixed in appropriate proportions, uniformly stirred, compacted and cured. Concrete has the characteristics of abundant raw materials, low cost, and simple production process. At the same time, concrete also has good plasticity and high strength, so the application of concrete is becoming more and more extensive. The various components of concrete are mixed in a certain proportion, and the mixture in a plastic state that has not yet set and hardened is called concrete mixture, also known as fresh concrete. [0003] Any concrete structure is mainly used to bear loads or resist various forces, an...
Claims
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