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A concrete and mixture technology, applied in the field of concrete and its preparation technology, can solve the problems of large shrinkage and deformation of concrete, cracking of concrete, high heat of hydration of concrete, etc., and achieve the effect of increasing connection effect, improving compressive strength, and improving impermeability
Active Publication Date: 2017-12-15
深圳市圣威宝混凝土有限公司
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Problems solved by technology
However, due to the widespread shrinkage of concrete (especially large-volume concrete and high-strength concrete, etc.), the performance of concrete cracking, strength, anti-seepage, and corrosion resistance is reduced.
However, the obvious defects of using expansion agents as shrinkage-compensating concrete materials in the market are: the heat of hydration of concrete is high, the shrinkage and deformation of concrete are large, and concrete cracking and leakage are common.
Method used
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Embodiment 1
[0083] Embodiment 1: A kind of concrete, the component that comprises and corresponding weight parts thereof are as shown in Table 1, and obtain through following steps preparation:
[0084] S1, fully mix P.O42.5 cement, sand, gravel, secondary fly ash, slag, polycarboxylate water reducing agent, and expansion agent to form the first mixture;
[0085] S2, adding the additive into the water, and fully mixing to form a second mixture;
[0086] S3, adding a fiber mixture and an antifoaming agent to the second mixture obtained in step S2, and fully mixing to form a third mixture;
[0087] S4, adding the third mixture obtained in step S3 to the first mixture obtained in step S1, and mixing thoroughly to obtain.
[0088] Wherein, the stones include fine stones and coarse stones, the ratio of the parts by weight of fine stones and coarse stones is 0.4-0.5:1, the single particle size of fine stones is 5-10mm, and the single particle size of coarse stones is 16-31.5mm ;
[0089] The...
Embodiment 2-7
[0094] Embodiment 2-7: a kind of concrete, the difference from embodiment 1 is that the components and their corresponding parts by weight are shown in Table 1.
[0095] Components and corresponding parts by weight thereof included in Table 1 embodiment 1-7
[0096]
Embodiment 8
[0097] Embodiment 8: A kind of concrete. The difference from Embodiment 1 is that in the additive, the ratio of parts by weight of MCC, xanthan gum and polyvinylpyrrolidone is 1:2:1.
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Abstract
The invention discloses concrete and a preparation technology thereof. The concrete comprises, by weight, 290-345 parts of cement, 870-945 parts of sand, 750-900 parts of stones, 80-105 parts of fly ash, 56-88 parts of slag, 1-3 parts of polycarboxylate-type water reducing agent, 0.5-2 parts of expanding agent, 0.8-1.5 parts of addictive, 3-8 parts of fiber mixtures, 1-2 parts of defoaming agent and 145-170 parts of water. The cement is P.O 42.5 cement, the additive comprises MCC, xanthan gum and polyvinylpyrrolidone, the fiber mixtures comprise at least two kinds of glass fiber, steel fiber and carbon fiber, and the defoaming agent comprises at least one kind of polysiloxane and polyether modified polysiloxane. The concrete and the preparation technology have the advantages that the air content is lowered, and the impervious performance and the crack resistance of the solidified concrete are improved.
Description
technical field [0001] The invention relates to the technical field of concrete preparation, more specifically, it relates to a concrete and its preparation process. Background technique [0002] Concrete is one of the most important civil engineering materials in contemporary times and is widely used in all aspects of construction. However, due to the widespread shrinkage of concrete (especially mass concrete and high-strength concrete, etc.), the performance of concrete cracking, strength, anti-seepage, and corrosion resistance is reduced. However, the obvious disadvantages of using expansion agents as shrinkage-compensating concrete materials in the market are: the heat of hydration of concrete is high, the shrinkage and deformation of concrete are large, and phenomena such as cracking and leakage of concrete are common. Therefore, a concrete with better impermeability and crack resistance has better commercial prospects. Contents of the invention [0003] In view of ...
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