Concrete admixture and preparation method thereof

A technology of concrete admixture and water reducing agent, applied in the field of building materials, can solve the problems of poor compatibility of water reducing agent, segregation and stratification, etc., and achieve the effects of low cost, low reaction temperature and simple production process

Pending Publication Date: 2019-02-01
QUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the viscosity modifiers and water reducers currently on the market have poor compatibility, and segregation and stratification are prone to occur after being mixed into concrete

Method used

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  • Concrete admixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A concrete admixture, the total mass is 1000g, the concrete admixture is composed of the following raw materials in parts by weight: 280g of water reducer, 6g of viscosity modifier, 100g of expansion agent, and the rest is water;

[0019] In this example, the water reducer is an ether polycarboxylate high-performance water reducer, the viscosity regulator is an industrial grade water-soluble polyvinyl acetate redispersible latex powder, and the expansion agent is a soluble slow-release cement-based gelling material. plastic expansion agent;

[0020] The preparation method of concrete admixture comprises the following steps:

[0021] Add the water reducer, viscosity modifier, expansion agent and water into the disperser in sequence in proportion, raise the temperature to 50-60°C, stir and mix at 2000-2500r / min for 40-50min to obtain an emulsion;

[0022] Step 2: Cool to room temperature after the reaction, and discharge to obtain the concrete admixture.

[0023] Get ab...

Embodiment 2

[0025] A concrete admixture, the total mass is 1000g, the concrete admixture is composed of the following raw materials in parts by weight: 280g of water reducer, 10g of viscosity modifier, 100g of expansion agent, and the rest is water;

[0026] In this example, the water reducer is an ether polycarboxylate high-performance water reducer, the viscosity regulator is an industrial grade water-soluble polyvinyl acetate redispersible latex powder, and the expansion agent is a soluble slow-release cement-based gelling material. plastic expansion agent;

[0027] The preparation method of concrete admixture comprises the following steps:

[0028] Add the water reducer, viscosity modifier, expansion agent and water into the disperser in sequence in proportion, raise the temperature to 50-60°C, stir and mix at 2000-2500r / min for 40-50min to obtain an emulsion;

[0029] Step 2: Cool to room temperature after the reaction, and discharge to obtain the concrete admixture.

[0030] Get a...

Embodiment 3

[0032] A concrete admixture, the total mass is 1000g, the concrete admixture is composed of the following raw materials in parts by weight: 300g of water reducer, 6g of viscosity modifier, 100g of expansion agent, and the rest is water;

[0033] In this example, the water reducer is an ether polycarboxylate high-performance water reducer, the viscosity regulator is an industrial grade water-soluble polyvinyl acetate redispersible latex powder, and the expansion agent is a soluble slow-release cement-based gelling material. plastic expansion agent;

[0034] The preparation method of concrete admixture comprises the following steps:

[0035] Add the water reducer, viscosity modifier, expansion agent and water into the disperser in sequence in proportion, raise the temperature to 50-60°C, stir and mix at 2000-2500r / min for 40-50min to obtain an emulsion;

[0036] Step 2: Cool to room temperature after the reaction, and discharge to obtain the concrete admixture.

[0037] Get ab...

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PUM

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Abstract

The invention discloses a concrete admixture. According to the key point of the technical scheme, the concrete admixture is composed of the following raw materials (by weight): 28-32 parts of a waterreducing agent, 0.6-1 part of a viscosity regulator, 8-12 parts of an expanding agent, and the balance water. The invention aims to provide a concrete admixture with good compatibility and stability.After the concrete admixture is added into concrete, viscosity of the concrete can be obviously reduced without affecting fluidity of the concrete.

Description

technical field [0001] The invention relates to the technical field of building materials, more specifically, it relates to a concrete admixture and a preparation method thereof. Background technique [0002] Concrete is the most widely used building material in modern times. It has the advantages of abundant raw materials, low price, simple process, high strength and good durability. In engineering applications, construction parties usually use high-strength cement and reduce the water-binder ratio to improve concrete strength. However, these measures often lead to an increase in the viscosity of the concrete, a slowing of the flow rate, and a slowing of the concrete jacking speed, and during the construction process, pipe plugging and pipe bursting often occur. [0003] At present, the effective way to solve such problems is usually to mix a certain amount of viscosity modifier and water reducer in concrete to improve the workability of concrete. However, the viscosity m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/26
CPCC04B40/0039C04B24/24C04B24/2623C04B2103/0068
Inventor 谢咸颂周夏昕鲍泽勇赵勋陈骏商浩楠梁好
Owner QUZHOU UNIV
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