Pumping agent suitable for lightweight aggregate concrete

A light aggregate concrete and pumping agent technology, which is applied in the field of building material manufacturing, can solve the problems of restricting the widespread use of light aggregate concrete, slump loss of light aggregate concrete, and poor pumping performance of light aggregate concrete. Achieve the effect of reducing bleeding and layering segregation, improving antifreeze ability and fast speed

Inactive Publication Date: 2019-01-29
贵州凯襄新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lightweight aggregate with a porous structure continues to absorb water from the surrounding slurry in the concrete, and the water in the slurry is pressed into the lightweight aggregate, causing the slump loss of the lightweight aggregate concrete, which affects the loss of concrete over time. The poor pumpability of aggregate concrete limits the widespread use of lightweight aggregate concrete
[0003] At present, people mainly improve the pumpability of lightweight aggregate concrete by reducing the water absorption performance of lightweight aggregate under the action of pump pressure; Problem with limited pumping distance

Method used

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  • Pumping agent suitable for lightweight aggregate concrete

Examples

Experimental program
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Effect test

Embodiment 1

[0016] The pumping agent suitable for light aggregate concrete in this embodiment is composed of the following raw materials according to the percentage of the total weight of raw materials: 75% silica fume, 15% lignin fiber, 1% retarder, cellulose Ether 5%, dispersant 1%, air-entraining agent 0.3%, sodium glucoheptonate 1%, zinc stearate 1.7%.

[0017] Each component of the pumping agent suitable for light aggregate concrete in this embodiment is a commercially available product. Specifically, the retarder in this embodiment is preferably sodium gluconate, and the retarder can also be selected from sugar calcium, sugar Powder, sodium tripolyphosphate, maltodextrin, sodium hexametaphosphate, sucrose any one.

[0018] The pumping agent suitable for light aggregate concrete in this embodiment is weighed according to the percentage of the total weight of the above-mentioned raw materials, and then added to a single-horizontal shaft forced mixer and stirred at the same time, and i...

Embodiment 2

[0028] The pumping agent suitable for light aggregate concrete in this embodiment is composed of the following raw materials according to the percentage of the total weight of raw materials: 62% silica fume, 20% lignin fiber, 3% retarder, cellulose Ether 7%, dispersant 3%, air-entraining agent 0.6%, sodium glucoheptonate 3%, zinc stearate 1.4%.

[0029] In this embodiment, the upper component is taken according to the proportion. The preparation method and raw materials of this embodiment are the same as those in Example 1; the retarder in this embodiment is preferably sodium gluconate, and the retarder can also be calcium sugar or powdered sugar. , sodium tripolyphosphate, maltodextrin, sodium hexametaphosphate, sucrose; the air-entraining agent in the present embodiment is preferably sodium dodecylsulfonate, and AOS air-entraining agent or saponin can also be selected Any one of the glycoside powders, wherein the AOS air-entraining agent refers to sodium α-olefin sulfonate; ...

Embodiment 3

[0031] The pumping agent suitable for light aggregate concrete in this embodiment is composed of the following raw materials according to the percentage of the total weight of raw materials: 50% silica fume, 25% lignin fiber, 5% retarder, cellulose Ether 10%, dispersant 4%, air-entraining agent 0.9%, sodium glucoheptonate 4%, zinc stearate 1.1%.

[0032] In this embodiment, the upper component is taken according to the ratio, and the preparation method and raw materials of the present embodiment are the same as in Example 1; the retarder in this embodiment is preferably sodium gluconate, and the retarder can also be selected from sugar calcium, Any one of powdered sugar, sodium tripolyphosphate, maltodextrin, sodium hexametaphosphate, sucrose; the air-entraining agent in this embodiment is preferably sodium dodecyl sulfonate, and AOS air-entraining agent or Any one of the saponin powders, wherein the AOS air-entraining agent refers to sodium α-olefin sulfonate; the preferred p...

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Abstract

The invention discloses a pumping agent suitable for a lightweight aggregate concrete, and relates to the technical field of building material manufacturing. The pumping agent suitable for the lightweight aggregate concrete comprises the following raw materials in percent in terms of the total weight of the raw materials: 50%-75% of silica fume, 15%-25% of lignin fibers, 1%-5% of a retarder, 5%-10% of cellulose ether, 1%-5% of a dispersant, 0.3%-0.9% of an air entraining agent, 1%-5% of sodium glucoheptonate, and 0.5%-3% of zinc stearate. According to the pumping agent, the moisture absorbed by a lightweight aggregate in a pumping process can be compensated, and the pumping loss of the lightweight aggregate concrete can be reduced. In addition, the homogeneity of the lightweight aggregateconcrete can be improved by using the silica fume as a carrier material. Moreover, the lignin fibers can be dispersed and lapped into a fiber network in the lightweight aggregate concrete, thereby thefloating of the lightweight aggregate is restrained, the homogeneity of the concrete is further improved, and the pumping performance is improved.

Description

technical field [0001] The invention relates to the technical field of building material manufacturing, in particular to a pumping agent suitable for light aggregate concrete. Background technique [0002] The lightweight aggregate of lightweight aggregate concrete has a porous structure, and lightweight aggregate concrete has the functional characteristics of light weight, high strength, heat preservation, sound insulation, and earthquake resistance. However, the lightweight aggregate with a porous structure continues to absorb water from the surrounding slurry in the concrete, and the water in the slurry is pressed into the lightweight aggregate, causing the slump loss of the lightweight aggregate concrete, thereby affecting the loss of concrete over time. The poor pumpability of aggregate concrete limits the widespread use of lightweight aggregate concrete. [0003] At present, people mainly improve the pumpability of lightweight aggregate concrete by reducing the water ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38
CPCC04B40/0039C04B18/146C04B18/26C04B24/383C04B24/10C04B24/085C04B24/16C04B24/281C04B22/16C04B24/38
Inventor 张鑫
Owner 贵州凯襄新材料有限公司
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