Novel cement-based composite material with low hydration heat and preparation method thereof

A composite material, low hydration heat technology, used in the field of building materials, can solve problems such as temperature cracks, and achieve the effects of inhibiting cracks, prolonging plasticity, and prolonging heat release time

Inactive Publication Date: 2021-12-07
SUZHOU GUARDEX NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the above-mentioned shortcomings, one of the purposes of the present invention is to provide a new type of cement-based composite material with low heat of hydration, which can effectively solve the problem of temperature cracks in large-volume concrete due to the serious heat release of hydration reactions.

Method used

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  • Novel cement-based composite material with low hydration heat and preparation method thereof

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preparation example Construction

[0022] A kind of preparation method of the cement-based composite material of novel low heat of hydration of the present invention, comprises the steps:

[0023] (1) Take cement, water, siliceous fine sand, biomass combination acid, siliceous mineral admixture, polycarboxylate water reducer, silica-alumina mineral admixture, organic retarder respectively by weight, and Place it for later use; (2) add the cement, siliceous fine sand, siliceous mineral admixture, biomass combination acid and silicon-aluminum mineral admixture in the step (1) into the mixer and dry stir for a period of time (3) Add water and polycarboxylate superplasticizer in turn, and slowly add organic retarder under stirring state to obtain the cement-based composite material mixture; (4) Pour the cement-based composite material mixture into the mold After being filled, it is smoothed and covered with plastic wrap, and the formwork is removed after curing to obtain a new type of cement-based composite materia...

Embodiment 1

[0033] Take by weighing 180g of cement, 80g of water, 540g of siliceous fine sand, 0.18g of biomass combined acid, 30g of siliceous mineral additive, 1.5g of polycarboxylate superplasticizer, 22g of silica-alumina mineral admixture, sodium gluconate ( Organic retarder) 0.2g.

Embodiment 2

[0035] Take by weighing cement 180g, water 80g, siliceous fine sand 540g, biomass combination acid 0.36g, siliceous mineral admixture 30g, polycarboxylate superplasticizer 1.5g, silica-alumina mineral admixture 22g, sodium gluconate ( Organic retarder) 0.2g.

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Abstract

The invention discloses a novel cement-based composite material with low hydration heat and a preparation method thereof. The cement-based composite material comprises, in parts by weight, 160 to 200 parts of Portland cement, 60 to 100 parts of water, 450 to 600 parts of siliceous fine sand, 0.25 to 0.6 part of biomass combined acid, 20 to 40 parts of a siliceous mineral admixture, 1 to 2 parts of a polycarboxylic acid water reducing agent, 16 to 30 parts of a silicon-aluminum mineral admixture and 0.08 to 0.4 part of an organic retarder, wherein the biomass combined acid is formed by compounding tara tannin and gallnut tannin. The cement-based composite material disclosed by the invention can effectively solve the problem of temperature cracks caused by serious heat release in the hydration reaction of mass concrete, the preparation method is simple to operate, and the strength and long-term stability of the cement-based composite material can be improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a novel cement-based composite material with low heat of hydration and a preparation method thereof. Background technique [0002] With the continuous development of modern construction engineering, mass concrete has been widely used in large-scale buildings, super high-rise buildings and some long-span bridge projects in the field of civil engineering due to its advantages of convenient use and easy construction. The hydration reaction of cement, the main component of concrete, is exothermic, and the low heat conduction of concrete itself often leads to a particularly large temperature gradient inside and outside the concrete structure, resulting in a large number of temperature cracks in the concrete itself. At present, there are two main ways to solve this problem. One is to use low-heat cement as raw material to effectively reduce the heat generated by hydration re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B14/06C04B24/04C04B18/08C04B2103/302C04B24/10
Inventor 姚国友张明珠石小成金鑫
Owner SUZHOU GUARDEX NEW MATERIAL TECH CO LTD
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