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High-strength lightweight aggregate concrete and preparation method thereof

A high-strength concrete and lightweight aggregate technology, which is applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of high density and low strength, and achieve the advantages of simple preparation process, high strength and light weight Effect

Inactive Publication Date: 2015-11-11
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a lightweight aggregate high-strength concrete and its preparation method, which overcomes the defects of high density and low strength of the existing lightweight aggregate concrete, and prepares a strength grade of LC40-LC50 with an apparent density of 1700-1900kg / m 3 lightweight aggregate high strength concrete

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A lightweight aggregate high-strength concrete, which is made of the following raw materials in terms of mass fractions: 350 parts of cement, 90 parts of fly ash, 157.5 parts of water, 680 parts of fine sand, 550 parts of pumice, and naphthalene-based superplasticizer 2.2 servings.

[0028] A method for preparing the above-mentioned lightweight aggregate high-strength concrete, the method comprising the following steps:

[0029] 1) Stir pumice, fine sand and fly ash in a mixer for 2 minutes;

[0030] 2) Add 1 / 2 of the total amount of water to the mixture obtained in step 1), and stir for 2 minutes;

[0031] 3) Add cement, naphthalene-based high-efficiency superplasticizer and the remaining water to the mixture obtained in step 2), stir for 3 minutes, put the mixture into a 100×100×100mm mold and shape it with a vibrating table, and then place it at a temperature of 20±2°C, The standard curing box with a humidity of 95% was cured for 24 hours and then naturally cured f...

Embodiment 2

[0034] A lightweight aggregate high-strength concrete, which is made of the following raw materials in terms of mass fractions: 350 parts of cement, 90 parts of fly ash, 157.5 parts of water, 680 parts of fine sand, 620 parts of ceramsite, and naphthalene-based high-efficiency water-reducing 2.2 parts of the agent.

[0035] A method for preparing the above-mentioned lightweight aggregate high-strength concrete, the method comprising the following steps:

[0036] 1) Stir ceramsite, fine sand and fly ash in a mixer for 2 minutes;

[0037] 2) Add 1 / 2 of the total amount of water to the mixture obtained in step 1), and stir for 2 minutes;

[0038] 3) Add cement, naphthalene-based high-efficiency superplasticizer and the remaining water to the mixture obtained in step 2), stir for 3 minutes, put the mixture into a 100×100×100mm mold and shape it with a vibrating table, and then place it at a temperature of 20±2°C, The standard curing box with a humidity of 95% was cured for 24 ho...

Embodiment 3

[0041] A lightweight aggregate high-strength concrete, which is made of the following raw materials in terms of mass fractions: 370 parts of cement, 120 parts of fly ash, 170 parts of water, 660 parts of fine sand, 600 parts of ceramsite, and naphthalene-based high-efficiency water-reducing 2.5 parts.

[0042] A method for preparing the above-mentioned lightweight aggregate high-strength concrete, the method comprising the following steps:

[0043] 1) Stir ceramsite, fine sand and fly ash in a mixer for 2 minutes;

[0044] 2) Add 1 / 2 of the total amount of water to the mixture obtained in step 1), and stir for 2 minutes;

[0045] 3) Add cement, naphthalene-based high-efficiency superplasticizer and the remaining water to the mixture obtained in step 2), stir for 3 minutes, put the mixture into a 100×100×100mm mold and shape it with a vibrating table, and then place it at a temperature of 20±2°C, The standard curing box with a humidity of 95% was cured for 24 hours and then n...

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Abstract

The invention provides a high-strength lightweight aggregate concrete and a preparation method thereof. The high-strength lightweight aggregate concrete is prepared from the following raw materials in parts by mass: 350-500 parts of cement, 450-650 parts of lightweight aggregate, 650-750 parts of natural river sand, 140-170 parts of water, 0-200 parts of coal ash and 2-3.5 parts of an additive. The preparation method comprises the following steps: (1) stirring and mixing lightweight aggregate, natural river sand and coal ash; (2) adding 1 / 2 of total water into a mixture obtained in the step (1), and stirring and mixing; (3) adding cement, a water reducer and rest water into a mixture obtained in the step (2), stirring, mixing, forming and then carrying out standard curing. The high-strength lightweight aggregate concrete has the strength grade of LC40-LC50, and the apparent density of 1700-1900 kg / m<3>, can effectively reduce the dead weight of a structure and the sectional size to increase the usable area, and is high in strength and favorable in working performance, vibration resistance and endurance quality.

Description

technical field [0001] The invention relates to a concrete building material, in particular to a lightweight aggregate high-strength concrete and a preparation method thereof. Background technique [0002] With the development of modern buildings to large spans and high-rises, in order to reduce the structural section, reduce the structural weight, and improve the performance of thermal insulation, light, high-strength, multi-functional, durable, disaster-resistant, and sustainable building materials have become civil engineering materials. It is an important research topic in the world and one of the important development directions of modern concrete technology. Because of these advantages, lightweight aggregate concrete has become a new type of concrete with the largest consumption after ordinary concrete. [0003] Lightweight aggregate concrete is made of light coarse aggregate, light sand (or ordinary sand), cement and water with a dry apparent density not greater than...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/04C04B14/06C04B18/08
CPCY02W30/91
Inventor 李震刘晓圣徐丽赵宇航王秋玲
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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