Early-stage anti-cracking high-strength concrete and preparation method thereof
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A high-strength, concrete technology, applied in the field of concrete, can solve the problems of low concrete structural strength, poor concrete compactness, easy fracture or cracking, etc., and achieve the effect of improving industrial production efficiency, high structural strength, and overall quality assurance.
Inactive Publication Date: 2020-08-14
上海兆捷实业发展有限公司
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[0004] In the patent application for the above-mentioned invention, slurry water, mineral powder, fly ash, stone chips and ultra-fine sand are waste materials whose consumption accounts for more than 45% of the total amount of concrete materials. The material cost is low and the cost of concrete raw materials is reduced, but the waste The stability of segmented sinter is poor. When it is used in the preparation of concrete, it has poor combination with other raw materials, resulting in poor compactness of concrete, which in turn leads to low overall structural strength of concrete. prone to breakage or cracking
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Embodiment 1
[0050] Embodiment 1: as figure 1 , a kind of early anti-cracking high-strength concrete, each component and its corresponding parts by weight are shown in Table 1, and it is prepared through the following steps: including the following steps:
[0051] S1, according to Table 1, mix Portland cement, medium sand, gravel, mineral powder and whole tailings in corresponding parts by weight, and stir for 6 minutes at a speed of 500 rpm to form a mixture;
[0052]S2, adding retarder and water reducer in corresponding parts by weight into water, stirring at 800rpm for 5min to form a mixed solution;
[0053] S3, adding the mixed solution into the mixture, and continuously stirring and mixing at 600 rpm for 8 minutes, to obtain early-stage crack-resistant high-strength concrete.
[0054] In this embodiment, citric acid is used as retarder.
[0055] In this embodiment, the density of the whole tailings is 2.69g / cm 2 , the bulk density is 1.3g / cm 3 , the porosity is greater than 50%, a...
Embodiment 2-6
[0057] Example 2-6: An early-stage crack-resistant high-strength concrete. The difference from Example 1 is that each component and its corresponding parts by weight are shown in Table 1.
[0058] Each component and parts by weight thereof in table 1 embodiment 1-6
[0059]
[0060]
Embodiment 7
[0061] Example 7: An early crack-resistant high-strength concrete, the difference from Example 1 is that the particle size distribution of the full tailings is between 80-100 μm.
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Abstract
The invention discloses early-stage anti-cracking high-strength concrete and a preparation method thereof, and relates to the technical field of concrete. The early-stage anti-cracking high-strength concrete comprises the following components in parts by weight: 190 to 210 parts of water, 330 to 350 parts of Portland cement, 480 to 520 parts of medium sand, 720 to 790 parts of broken stone, 2.5 to3.5 parts of a water reducing agent, 60 to 80 parts of mineral powder, 4 to 6 parts of a retarder, and 30 to 35 parts of full tailings with the density of 2.69 g / cm<2>, the loose volume weight of 1.3g / cm<3> and the porosity of larger than 50%. The early-stage anti-cracking high-strength concrete is prepared by the following steps: S1, fully mixing Portland cement, medium sand, broken stone, mineral powder and full tailings in corresponding parts by weight to form a mixture, S2, adding the retarder and the water reducing agent in corresponding parts by weight into water to form a mixed solution, and S3, adding the mixed solution into the mixture, and continuously stirring and mixing to obtain the product. The prepared concrete has the advantages of being high in structural strength and not prone to cracking in the early forming process.
Description
technical field [0001] The invention relates to the technical field of concrete, more specifically, it relates to an early crack-resistant high-strength concrete and a preparation method thereof. Background technique [0002] Concrete refers to the cement concrete obtained by using cement as the cementitious material, sand and stone as the aggregate, mixed with water, admixtures and admixtures in a certain proportion, and is also called ordinary concrete. It is widely used in civil engineering . [0003] A concrete formula is disclosed in the Chinese invention application patent with the publication number CN107188466A, which is made of the following components according to the weight ratio: 100-150 parts of cement; 5-25 parts of iron powder; 760-880 parts of sand ; 50-70 parts of fly ash; 15-34 parts of waste calcined material; 15-30 parts of admixture; 170-190 parts of slurry; 36-85 parts of aggregate; -520 parts; gravel 1050-1100 parts. [0004] In the patent applicati...
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