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Concrete composition containing ultra-fine carbonate rock powder and preparation method thereof

A technology of concrete composition and carbonate rock, which is applied in the field of concrete building materials to achieve the effects of cost reduction, low energy consumption and water consumption

Inactive Publication Date: 2009-07-01
北京恒坤混凝土有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to provide a kind of concrete composition containing superfine carbonate rock powder and preparation method thereof, solve the problem that further improves concrete mechanical property and durable performance, solve the problem that further reduces cement consumption and water consumption in concrete simultaneously, Improve the cost performance of concrete, save resources and energy, and protect the environment

Method used

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  • Concrete composition containing ultra-fine carbonate rock powder and preparation method thereof
  • Concrete composition containing ultra-fine carbonate rock powder and preparation method thereof
  • Concrete composition containing ultra-fine carbonate rock powder and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046]According to the following raw materials and the concrete mixing ratio shown in Table 3, the concrete was prepared and the compressive strength was measured. In Table 3, Mix01-Mix06 are the mixing ratios of the examples. Cement, ground slag and ultrafine carbonate rock powder are used to form a multi-element powder, and polycarboxylic acid superplasticizer is added. The cement and ground slag each account for 50% of the cementing material; the ultra-fine carbonate rock powder accounts for 20%-37% of the total powder material in the concrete. In Table 3, Mix07-Mix12 are the mixing ratios of the comparative example, without superfine carbonate rock powder.

[0047] (1) Raw materials:

[0048] Cement: Luquan Dingxin Ordinary Portland Cement P.O 42.5;

[0049] Mineral admixture: use Beijing Shougang's finely ground slag, specific gravity 2.9, fineness specific surface area: 400m 2 / kg;

[0050] Sand: medium sand;

[0051] Crushed stone: 5-20mm crushed stone;

[0052] Superplasti...

Embodiment 2

[0065] Example 2: Concrete was prepared according to the following raw materials and the concrete mixing ratio shown in Table 5, and the compressive strength was measured. In Table 5, Mix13-Mix17 are the mixing ratios of the examples. Cement, fly ash and ultrafine carbonate rock powder are used to form a multi-element powder, and polycarboxylic acid superplasticizer is added. Cement and fly ash each account for 50% of the cementing material; ultra-fine carbonate rock powder accounts for 28%-29% of the powder material content in concrete. In Table 5, Mix18-Mix22 is the mixing ratio of the comparative example, without superfine carbonate rock powder.

[0066] (1) Raw materials:

[0067] Cement, sand, crushed stone, ultra-fine carbonate rock powder: same as Example 1; mineral admixture: use fly ash from Beijing Shijingshan Thermal Power Plant; superplasticizer: Basfir Chemical Building Materials Glenium Ace68 polycarboxylic acid Water reducing agent.

[0068] (2) The test method is t...

Embodiment 3

[0076] Example 3: Concrete was prepared according to the following raw materials and the concrete mix ratio shown in Table 7, and the compressive strength was measured. The mixing ratio of Mix23-Mix26 in Table 7 is an example. Cement, ground slag and ultrafine carbonate rock powder are used to form a multi-element powder, and a naphthalene-based superplasticizer is added. Cement and ground slag each account for 50% of the cementing material; ultra-fine carbonate rock powder accounts for 28%-37% of the powder material content in concrete. The mixing ratio of Mix27-Mix29 in Table 7 is a comparative example, without superfine carbonate rock powder.

[0077] (1) Raw materials:

[0078] Cement, sand, crushed stone, ultra-fine carbonate rock powder: the same as Example 1; mineral admixture: ground slag produced by Beijing Shougang, specific gravity 2.9, fineness specific surface area: 400m 2 / kg; Superplasticizer: Tianjin Yongyang UNF-5 naphthalene series superplasticizer.

[0079] (2) ...

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Abstract

The invention relates to a concrete composition containing superfine carbonate rock powder and a preparation method thereof. The concrete composition is prepared by mixing multi-element powder, admixture, coarse aggregate, fine aggregate and water, and each cubic meter The dosage range of multi-component powder in concrete is 300kg / m3-550kg / m3, the multi-component powder contains 70kg / m3-150kg / m3 ultra-fine carbonate rock powder, and the rest is cement and mineral admixture, which is composed of cement and mineral The aggregate forms the cementing material, and the weight percentage of cement in the cementing material is 20%-100%. The invention can reduce the water consumption of concrete, greatly reduce the cement consumption, and prepare high-strength concrete. The concrete has the characteristics of saving energy, resources and protecting the environment. The invention can prepare concrete suitable for various purposes.

Description

(1) Technical field [0001] The invention relates to a concrete building material. (2) Background technology [0002] Concrete is the most widely used building material in modern times. It is mainly made of cement, mixed with mineral admixtures, water and admixtures are added to prepare cement paste, and then mixed with sand and stone evenly, and poured on beams, columns, In various models such as walls and slabs, solidification and hardening form a whole engineering material. Concrete is a multi-element multi-phase cement-based composite material containing solid, liquid and gas three phases formed by mixing and hardening a variety of raw materials with water. Because there are a large number of micro-pores in the concrete, it is the existence of these micro-pores that affect the compactness, mechanical properties and impermeability of concrete. The water-binder ratio of concrete is the ratio of the water in the concrete to the weight of the cementing material. The water-binder r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B18/12C04B14/26C04B18/08C04B18/14C04B24/24C04B24/22
CPCC04B28/02
Inventor 段雄辉何涌东于鸣新
Owner 北京恒坤混凝土有限公司
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