Lightweight aggregate concrete and preparation method thereof

A lightweight aggregate concrete and fine aggregate technology, applied in the field of concrete, can solve the problems of complex process, low water absorption, low bonding force between lightweight aggregate and cement, etc., to reduce alkali aggregate reaction, slow down the reaction rate, The effect of increasing early strength

Active Publication Date: 2014-04-02
北京东方建宇混凝土科学技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned documents disclose that the silicomanganese slag can be used as lightweight aggregate for lightweight aggregate concrete after special processing to obtain expanded slag and expanded beads, the process of forming expanded slag and expanded beads through special treatment is complicated, and It will greatly increase the processing cost of silicon-manganese slag, a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The formula of LC40 lightweight aggregate concrete described in this example is as follows: per cubic meter of concrete, 330kg of cement, 75kg of slag powder, 40kg of fly ash, 620kg of lightweight coarse aggregate, and 113.23kg of modified silicomanganese slag , 357kg of ordinary extra-fine sand, 161kg of water, and 10.2kg of water reducer; wherein, the lightweight coarse aggregate is 900-grade fly ash ceramsite with a cylinder compressive strength of 6.5MPa, and the modified silicomanganese slag is selected from citric acid Sodium-modified silico-manganese slag, the mass of silico-manganese slag in the modified silico-manganese slag is 113kg, and the mass of sodium citrate is 0.226kg.

[0043] The preparation method of concrete described in the present embodiment is as follows:

[0044] (1) Mix a specific amount of silicomanganese slag and a specific amount of sodium citrate evenly to obtain modified silicomanganese slag;

[0045] (2) Add a specific amount of ordinary...

Embodiment 2

[0049] The formula of LC30 lightweight aggregate concrete described in this example is as follows: per cubic meter of concrete, 300 kg of cement, 90 kg of slag powder, 595 kg of lightweight coarse aggregate, 125.37 kg of modified silicomanganese slag, and 125.37 kg of ordinary superfine 355kg of sand, 167kg of water, and 8.3kg of water reducer; wherein, the lightweight coarse aggregate is 800-grade clay ceramsite with a cylinder compressive strength of 6.0MPa, and the modified silicomanganese slag is silicomanganese modified with sodium gluconate. Slag, the mass of silicomanganese slag in the modified silicomanganese slag is 125kg, and sodium gluconate is 0.37kg.

[0050] The preparation method of concrete described in the present embodiment is as follows:

[0051] (1) Mix a specific amount of silicomanganese slag and a specific amount of sodium gluconate evenly to obtain modified silicomanganese slag;

[0052] (2) Add a specific amount of ordinary extra-fine sand to the modi...

Embodiment 3

[0056] The formula of LC60 lightweight aggregate concrete described in this embodiment is as follows: per cubic meter of concrete, cement is 410kg, slag powder is 90kg, fly ash is 50kg, lightweight coarse aggregate is 675kg, and modified silicomanganese slag is 84.34kg , 336kg of ordinary extra-fine sand, 148kg of water, and 16.1kg of water reducing agent; wherein, the lightweight coarse aggregate is 900-grade shale ceramsite with a cylinder compressive strength of 8.0MPa, and the modified silicomanganese slag is modified by sodium tartrate. The quality of silicomanganese slag in the modified silicomanganese slag is 84kg, and the quality of sodium tartrate is 0.34kg;

[0057] Wherein, the silicomanganese slag described in this embodiment has a selected particle size of 2 to 3 mm, a fineness modulus of 3.3, and an apparent density of 1800 kg / m 3 , bulk density is 850kg / m 3 , The crushing index is 10%; the particle size of the ordinary extra-fine sand is 0.5~0.8mm, and the fine...

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Abstract

The invention provides lightweight aggregate concrete and a preparation method thereof, belonging to the technical field of concrete preparation. The lightweight aggregate concrete contains the following raw materials: cement, fly ash, slag powder, modified lightweight silicomanganese slag fine aggregate, ordinary ultrafine sand, lightweight coarse aggregate, water reducing agent and water, wherein the modified lightweight silicomanganese slag fine aggregate is organic salt modified lightweight silicomanganese slag, and the lightweight silicomanganese slag has the particle size of 0-5mm, the fineness modulus of 3.1-3.6, the apparent density of 1,600-2,000kg/m<3>, the bulk density of 700-1,000kg/m<3> and the crushing index of 10-50%. The lightweight aggregate concrete provided by the invention has the advantages of low cost and stable performance, meanwhile, the utilization ratio of silicomanganese slag is greatly increased while the cost of the concrete is reduced, and then, the reduction of environmental pollution caused by the silicomanganese slag is facilitated.

Description

technical field [0001] The invention relates to a modified silicomanganese slag, concrete prepared by using the silicomanganese slag and a method for preparing the concrete, belonging to the technical field of concrete. Background technique [0002] Lightweight aggregate concrete refers to the dry apparent density of not more than 1950kg / m3 prepared by lightweight coarse aggregate, lightweight fine aggregate (or ordinary sand), cementitious material and water. 3 of concrete. Among them, the lightweight aggregate concrete prepared with lightweight fine aggregate as aggregate is full-light concrete; the lightweight aggregate concrete prepared with ordinary sand or part of lightweight fine aggregate as fine aggregate is sand-light concrete . Lightweight aggregate concrete is widely used in various projects due to its light weight, high strength, heat preservation, heat insulation, earthquake resistance, wear resistance and other functional characteristics. [0003] In the pr...

Claims

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Application Information

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IPC IPC(8): C04B28/00
Inventor 武俊宇段遵莉苗向阳耿斌徐嘉音王安岭张京涛李冀平
Owner 北京东方建宇混凝土科学技术研究院有限公司
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