Low-cement-content self-compacting concrete and preparation method thereof

A technology of self-compacting concrete and low cement consumption, applied in the field of building materials, can solve the problems of the limitation of the promotion and application of self-compacting concrete, the high price of self-compacting concrete, the large amount of cement, etc. Improve and improve the effect of pulp-solid ratio

Inactive Publication Date: 2017-04-26
湖南加美乐素新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the amount of cement used is large and the price is high, which makes the price of self-compacting conc

Method used

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  • Low-cement-content self-compacting concrete and preparation method thereof
  • Low-cement-content self-compacting concrete and preparation method thereof
  • Low-cement-content self-compacting concrete and preparation method thereof

Examples

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Embodiment

[0027] Formula: a self-compacting concrete with low cement content, consisting of the following components: cement 100-220kg / m 3 , Mineral admixture 50~200kg / m 3 , fine aggregate 500~650kg / m 3 , Coarse aggregate 720~900kg / m 3 , Concrete admixture 15 ~ 40kg / m 3 , Water 60~240kg / m 3 .

[0028] The specific parameters of the low cement content self-compacting concrete formulations of Examples 1 to 6 are listed in tabular form, specifically in Table 1:

[0029] The specific parameters of the low cement content self-compacting concrete formula of table 1 embodiment 1~6

[0030]

[0031]

[0032] The coarse aggregate is continuously graded, with a nominal particle size of 3-26mm and a void ratio of 38% or less; among them, those with a nominal particle size of 20-26mm account for 10-15% of the total mass of the coarse aggregate, and a nominal particle size of 15-20mm 14-19% of the total mass of coarse aggregate, 28-32% of the total mass of coarse aggregate with a nominal...

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Abstract

The invention provides low-cement-content self-compacting concrete. The low-cement-content self-compacting concrete is composed of the following ingredients: 100-220kg/m<3> of cement, 50-200kg/m<3> of mineral admixture, 500-650kg/m<3> of fine aggregate, 720-900kg/m<3> of coarse aggregate, 15-40kg/m<3> of concrete additive and 60-240kg/m<3> of water. A preparation method of the self-compacting concrete comprises the following steps: (1) putting the fine aggregate, coarse aggregate, cement, a water reducing agent and water into a mixing machine according to the formula ratio, and obtaining cement mortar; (2) putting the mineral admixture into the cement mortar, and mixing; and (3) then putting the rest concrete additive and the rest of water, mixing, and uniformly stirring, so that the self-compacting concrete is obtained. The low-cement-content self-compacting concrete provided by the invention can greatly reduce the cement content, reduce shrinkage by reducing the water cement ratio and improve the stability and strength of concrete, and carbon dioxide emission is reduced as the cement content is reduced, thereby being beneficial to energy conservation, emission reduction, consumption reduction and sustainable development of the environment.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a self-compacting concrete with low cement content and a preparation method thereof. Background technique [0002] Self-compacting concrete refers to the concrete that has high fluidity, good cohesion, uniformity and stability, and is compacted without vibrating by relying on its own weight during pouring. With the rapid development of the modernization of concrete construction projects in our country, self-compacting concrete has attracted widespread attention in our country, and its popularization and application have grown rapidly. Self-compacting concrete can fill the formwork by its own weight, without surface air bubbles or honeycomb pockmarks, and does not require surface repair; it can realistically present the texture or shape of the formwork surface, improving the appearance quality of the concrete. Without vibration, it can be poured into structures with co...

Claims

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Application Information

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IPC IPC(8): C04B28/00
CPCC04B28/00C04B2201/50C04B18/141C04B14/02C04B24/24C04B22/064C04B22/002C04B18/08C04B24/08C04B2103/44C04B14/14C04B14/047C04B24/16
Inventor 王伟廖声金李武龙威
Owner 湖南加美乐素新材料股份有限公司
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