Alkali-inhibiting additive for pervious concrete

A technology for permeable concrete and additives, applied in the field of permeable concrete additives, can solve the problems of affecting the appearance of permeable concrete, the decrease of interfacial adhesion, and the low strength of calcium hydroxide, so as to suppress the phenomenon of efflorescence, improve the weather resistance, and increase the service life. Effect

Inactive Publication Date: 2019-03-26
郭太宗 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Calcium hydroxide has low strength and poor stability, and is easily corroded to reduce the strength of pervious concrete products. Moreover, they are mostly enriched at the interface between cement stone and aggregate, and form coarse grains to form efflorescence, which not only affects the appearance of pervious concrete but also Decrease the cohesive force of the interface and reduce the strength of pervious concrete products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] An alkali inhibitory additive for permeable concrete, which is composed of the following raw materials in proportions by weight: 20% deionized water, 10% chelating agent, 25% potassium carbonate, 20% water reducing agent, 20% sodium silicate, and fumed silica 5 %.

Embodiment 2

[0011] An alkali inhibitory additive for permeable concrete, which is composed of the following raw materials in proportions by weight: 15% deionized water, 14% chelating agent, 20% potassium carbonate, 26% water reducing agent, 9% sodium silicate, and 16 fumed silica %.

Embodiment 3

[0013] An alkali inhibitory additive for permeable concrete, which is composed of the following raw materials in proportions by weight: 25% deionized water, 12% chelating agent, 20% potassium carbonate, 23% water reducing agent, 7% sodium silicate, and fumed silica 13 %.

[0014] Add the above-mentioned permeable concrete alkali inhibitory additives to the permeable concrete material, according to the proportion of 1 to 2% of the permeable concrete cement (weight), first add the permeable concrete alkali inhibitory additive to the permeable concrete material to mix evenly in the mixing water Afterwards, the aqueous solution containing the alkali inhibitory additive for permeable concrete is mixed evenly with the permeable concrete dry material. After using the permeable concrete alkali inhibitor additive of this embodiment, the alkali inhibitory effect is good, the strength of the permeable concrete product is improved, the weather resistance of the permeable concrete product is ...

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PUM

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Abstract

The invention provides an alkali-inhibiting additive for pervious concrete with alkali resistance, enhancement and weather resistance and a preparation method. The alkali-inhibiting additive for pervious concrete is prepared by the following steps: pre-adding the alkali-inhibiting additive for pervious concrete into mixing water needed by a previous concrete material according to a proportion of 1-2% based on total weight of cement first and uniformly mixing the mixture; and then mixing the aqueous solution containing the alkali-inhibiting additive for pervious concrete and the previous concrete dry material uniformly to obtain the alkali-inhibiting additive for pervious concrete. The alkali-inhibiting additive for pervious concrete can inhibit saltpetering of a pervious concrete product,so that the strength of the pervious concrete product is improved, the weather resistance of the pervious concrete product is improved, and the service life of the pervious concrete is prolonged.

Description

Technical field [0001] The invention relates to a permeable concrete additive, in particular to an alkali inhibitory additive capable of inhibiting the effusion of permeable concrete products, improving the strength of permeable concrete products, and improving the weather resistance of permeable concrete products and a preparation method thereof. Background technique [0002] Permeable concrete is made by mixing coarse aggregate, cement, reinforcing agent, and water. The surface of the coarse aggregate is covered with a thin layer of cement paste to bond each other to form a honeycomb structure with evenly distributed pores. It has air permeability, water permeability and weight. Light features. Permeable concrete can infiltrate rainwater into the soil in situ during the rainfall process, thereby producing the effect of purifying water bodies and protecting regional water resources. It is an environmentally friendly building material that is conducive to promoting water circulat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/10C04B103/60
CPCC04B40/0039C04B2103/603C04B22/10C04B2103/0086C04B2103/302C04B12/04C04B14/064
Inventor 郭太宗郭晓晶郭丝嘉陈风芝
Owner 郭太宗
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