High-strength lightweight aggregate concrete and preparation method thereof

A lightweight aggregate concrete and lightweight aggregate technology, applied in the field of building material concrete, can solve problems such as the failure to effectively improve the slump of lightweight aggregate concrete, reduce interface defects, improve mechanical properties and working performance, reduce The effect of slump loss

Inactive Publication Date: 2019-03-29
武汉中阳明建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lightweight aggregate concrete improves the pore structure in the interface between the cement mortar and the transition zone by adding mineral admixtures, and improves its resistance to chloride ion penetration, which is conducive to improving the corrosion resistance of the lightweight aggregate concrete, but the collapse of the lightweight aggregate concrete The fall has not been effectively improved

Method used

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  • High-strength lightweight aggregate concrete and preparation method thereof

Examples

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Effect test

preparation example 1

[0029] Preparation Example 1 Mix 30kg of polypropylene, 3.2kg of vinyl silane, and 0.4kg of dibenzoyl peroxide in a mixer, mix them evenly, and use a short fiber spinning machine to melt, plasticize and extrude at 190°C After stretching, spinning, winding and chopping, the modified polypropylene fiber with an average diameter of about 0.3±0.1mm and a length of 15mm is obtained.

preparation example 2

[0030] Preparation Example 2 Put 30kg of polypropylene, 3kg of vinyl silane, and 0.3kg of dibenzoyl peroxide in a mixer and mix them evenly. After stretching, spinning, winding and chopping, the modified polypropylene fiber with an average diameter of about 0.3±0.1mm and a length of 15mm is obtained.

[0031] Preparation Example 3 Mix 30kg of polypropylene, 2.8kg of vinyl silane, and 0.2kg of dibenzoyl peroxide in a mixer, mix them evenly, and melt, plasticize and extrude them with a short fiber spinning machine at 210°C After stretching, spinning, winding and chopping, the modified polypropylene fiber with an average diameter of about 0.3±0.1mm and a length of 15mm is obtained.

Embodiment 1

[0033] Embodiment 1 The embodiment provides a preparation method of high-strength lightweight aggregate concrete, comprising the following steps: weighing 262.5kg of cement, 187.5kg of fly ash ceramsite, 125kg of gangue ceramsite, and 137.5kg of shale Ceramsite, 212.5kg machine-made sand, 87.5kg river sand, 162.5kg fly ash, 22.5kg modified polypropylene fiber, 6.25kg water reducer, 0.75kg slump retaining agent, 0.25kg cellulose Ether, 0.05 kg of polyvinyl alcohol, 1.2 kg of polyacrylamide and 162.5 kg of water. Among them, the stone powder content of the machine-made sand is 5%. The modified polypropylene fiber used in this example is the modified polypropylene fiber prepared in Preparation Example 1. The water reducer used in this example is a polycarboxylate water reducer. The slump-retaining agent used in this embodiment is sodium citrate, and other ingredients and materials are common commercially available products.

[0034] Add fly ash ceramsite, coal gangue ceramsite a...

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Abstract

The invention relates to high-strength lightweight aggregate concrete and a preparation method thereof, and belongs to the technical field of building material concrete. The lightweight aggregate concrete is prepared from the following raw materials in parts by weight: 105-118 parts of cement, 180-185 parts of light coarse aggregate, 120-125 parts of fine aggregate, 65-70 parts of mineral admixtures, 9-24 parts of modified polypropylene fiber, 3.4-3.8 parts of concrete admixtures and 65-70 parts of water. The preparation method comprises the following steps that the raw materials are weighed according to the formula ratio, the light coarse aggregate is added into water accounting for one half of the total water amount for pre-wetting for 45-60 minutes, then the fine aggregate is added, stirring is carried out for 1-2 minutes, the cement, the mineral admixtures and the modified polypropylene fiber are continuously added, uniform stirring is carried out, then the concrete admixtures andthe rest water are added, and uniform stirring is carried out so as to obtain the high-strength lightweight aggregate concrete. The high-strength lightweight aggregate concrete and the preparation method thereof have the advantages that the strength is high, and the quality is stable.

Description

technical field [0001] The invention relates to the technical field of building material concrete, in particular to a high-strength lightweight aggregate concrete and a preparation method thereof. Background technique [0002] Concrete is one of the largest building materials in modern engineering structures. With the rapid development of my country's economic construction and the continuous improvement of infrastructure construction, the consumption of concrete has also increased sharply. Concrete is an engineering composite material that is bonded together by cementitious materials and aggregates. More than 2 billion tons of natural aggregates are consumed through concrete every year. The large-scale exploitation of aggregate resources will easily lead to the destruction of cultivated land, the destruction of forests, and the lack of resources. question. With the development of the construction industry, lightweight aggregate concrete with low density, good thermal insula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B111/40
CPCC04B28/00C04B2201/50C04B2201/20C04B2111/40C04B18/027C04B14/06C04B14/068C04B18/08C04B16/0633C04B2103/302C04B24/383C04B24/2623C04B24/2652C04B24/06
Inventor 杜明胜舒鹏飞
Owner 武汉中阳明建材有限公司
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