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Light aggregate concrete

A light aggregate concrete and mixture technology, applied in the field of building materials, can solve the problems of fresh concrete slump loss, large porosity of ceramsite concrete, high water absorption, etc., to broaden the scope of use, reduce salvage costs, improve flow sex change effect

Inactive Publication Date: 2017-01-11
天津市堃淏混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the large porosity and high water absorption of ceramsite concrete, it is easy to cause a large loss of slump in fresh concrete. Therefore, it is necessary to focus on the loss of slump over time when producing light aggregate concrete.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1: Weigh 1.5kg polycarboxylate retarding high-efficiency superplasticizer and 1.5kg tea-based superplasticizer and add them to the mixer for thorough mixing to prepare a mixed superplasticizer for use as a spare;

[0033] Step 2: Weigh 96kg of cement, 62kg of fly ash, 43kg of bauxite ceramsite, 43kg of coal gangue ceramsite, 104.5kg of natural river sand, 125.5kg of machine-made sand and 50kg of water and add them to the mixing mixer, and use 300rpm Stir at a rotating speed, and at the same time, add the mixed expansion agent and mixed water reducer in step 1 and step 2, and the stirring time is controlled at about 45 minutes;

[0034] Step 3: Weigh 1.4kg of CTF synergist, 1.4kg of LBD synergist, 2.4kg of sodium monofluorophosphate and 2.8kg of sodium alginate into the mixing mixer in step 2, and stir at a speed of 300rpm for another 10min. Thus the finished product is obtained.

[0035] Among them, bauxite ceramsite and gangue ceramsite are both 5-25mm continuous...

Embodiment 2

[0037] Step 1: Weigh 1.14kg polycarboxylate retarding high-efficiency superplasticizer and 2.26kg tea-based superplasticizer and add them to the mixer for thorough mixing to prepare a mixed superplasticizer for use as a spare;

[0038] Step 2: Weigh 100kg of cement, 70kg of fly ash, 36.8kg of bauxite ceramsite, 55.2kg of coal gangue ceramsite, 107kg of natural river sand, 139kg of machine-made sand and 58kg of water into the mixing mixer, and use 300rpm Stir at a rotating speed, and at the same time, add the mixed expansion agent and mixed water reducer in step 1 and step 2, and the stirring time is controlled at about 45 minutes;

[0039] Step 3: Weigh 1.44kg of CTF synergist, 2.16kg of LBD synergist, 2.8kg of sodium monofluorophosphate and 3.4kg of sodium alginate into the mixing mixer in step 2, and stir at a speed of 300rpm for another 10min. Thus the finished product is obtained.

[0040]Among them, bauxite ceramsite and gangue ceramsite are both 5-25mm continuous graded...

Embodiment 3

[0042] Step 1: Weigh 1.28kg polycarboxylate retarding high-efficiency superplasticizer and 1.92kg tea-based superplasticizer and add them to the mixer for thorough mixing to prepare a mixed superplasticizer for use as a spare;

[0043] Step 2: Weigh 98kg of cement, 66kg of fly ash, 38.7kg of bauxite ceramsite, 50.3kg of coal gangue ceramsite, 105.8kg of natural river sand, 132.2kg of machine-made sand and 54kg of water into the mixer, and Stir at a speed of 300rpm, and at the same time, add the mixed expansion agent and mixed water reducer in step 1 and step 2, and the stirring time is controlled at about 45min;

[0044] Step 3: Weigh 1.28kg of CTF synergist, 1.92kg of LBD synergist, 2.6kg of sodium monofluorophosphate and 3.1kg of sodium alginate into the mixing mixer in step 2, and stir at a speed of 300rpm for another 10min. Thus the finished product is obtained.

[0045] Among them, bauxite ceramsite and gangue ceramsite are both 5-25mm continuous graded gravel, density g...

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Abstract

Provided is light aggregate concrete. The light aggregate concrete is prepared from, by weight, 98 parts of cement, 66 parts of fly ash, 89 parts of ceramsite, 238 parts of fine aggregates, 3.2 parts of a water reducing agent, 3.2 parts of a synergist, 2.6 parts of sodium monofluorophosphate, 3.1 parts of sodium alginate and 54 parts of water. According to the light aggregate concrete, not only can the working property requirements be met, but also a shrinkage compensating function is achieved; in addition, by adding sodium monofluorophosphate and sodium alginate in the concrete, the corrosion resistance and the cracking resistance of the concrete are greatly enhanced, and then the application range of the concrete is greatly widened. More importantly, the light aggregate concrete has the good heat preservation and thermal insulation effects, the few slump loss is generated, and therefore the economic benefit is greatly increased.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a lightweight aggregate concrete. Background technique [0002] Light aggregate concrete is a concrete with an apparent density not greater than 1950kg / m3 prepared from light coarse aggregate, light fine aggregate (or ordinary sand), cement and water. 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 prior art, in order to further improve the heat preservation, heat insulation, wear resistance and other characteristics of light agg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B111/40
CPCC04B28/00C04B2111/40C04B2201/20C04B2201/50C04B18/08C04B18/023C04B14/06C04B24/22C04B24/267C04B22/16C04B24/38C04B2103/0068
Inventor 宁志国
Owner 天津市堃淏混凝土有限公司
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