A kind of diatomite modified concrete and preparation method thereof

Abstract

The invention discloses a diatomite modified concrete and a preparation method thereof. The diatomite modified concrete consists of the following components in parts by weight: 15-20 parts by weight of cement, 1-5 parts by weight of diatomite, 6-6 parts by weight of water 8 parts by weight, 25-30 parts by weight of river sand, 40-45 parts by weight of gravel, and 0.2-0.5 parts by weight of water reducing agent. In the present invention, by doping a certain proportion of diatoms in the concrete, the diatomite is pretreated in advance in the process of preparing the concrete, and the prepared concrete solves the problem of large early shrinkage of the high-strength concrete, and can effectively reduce the brittleness of the high-strength concrete , without reducing the strength of high-strength concrete.

Description

technical field

[0001] The invention relates to the technical field of concrete preparation, in particular to a diatomite modified concrete and a preparation method thereof. Background technique

[0002] Many experts and scholars at home and abroad are committed to improving the early crack resistance of high-strength concrete from the perspective of concrete materials. At present, there are two commonly used technical approaches to improve the early shrinkage of high-strength concrete: one is to add superplasticizers to concrete; the other is to add mineral admixtures. However, only adding water reducer can not improve the composition and quality of cement hydration products, but adding mineral admixtures can improve the early shrinkage of concrete and the composition and quality of cement hydration products. Studies have shown that adding mineral admixtures or adding pre-absorbent internal curing materials can effectively prevent early cracking of concrete. The currently...

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