Heat-resistant concrete and preparation method thereof

A technology of heat-resistant concrete and water reducing agent, applied in the field of concrete, can solve the problems of low crushing index of water slag, reduced early strength of concrete, poor workability of water slag and cement, etc., so as to reduce production cost, improve product quality, Increase the effect of retarding time

Inactive Publication Date: 2018-11-13
北京建工新型建材有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Water slag has many needle-point and flaky particles, and there are many internal pores, which leads to low crushing index of water slag and high water absorption
Water slag can reduce the heat of hydration of concrete and improve its durability; but there are also many disadvantages. For example, the addition of water slag will reduce the early strength of concrete and prolong the setting time. If more water slag is added to cement , the workability between water slag and cement will be poor, the water permeability will be greater, and the properties will be relatively unstable
[0006] Due to the h

Method used

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  • Heat-resistant concrete and preparation method thereof
  • Heat-resistant concrete and preparation method thereof
  • Heat-resistant concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Embodiment 1: A kind of heat-resistant concrete is prepared by the following method:

[0052] S1: Soak the slag fine aggregate in water for 30 hours at a temperature of 21°C;

[0053] S2: 130kg cement, 980.4kg basalt crushed stone, 19.6kg barite crushed stone, 530kg water slag, 160kg ceramic powder, 170kg mineral powder, 80kg fly ash, 2.5kg calcium formate, 2.5kg sodium silicate, 4kg early Strong polycarboxylate water reducer and 170kg of water are mixed and stirred evenly to obtain a mixture;

[0054] S3: The mixture is poured into the mold, and cured naturally for 15 hours to obtain heat-resistant concrete.

[0055] Among them, the cement is ordinary Portland cement of P.O.42.5; the particle size of the basalt crushed stone is 5-10mm continuous gradation, and the apparent density of the crushed stone is 2830kg / m 3 , the loose bulk porosity is 45%, and the loose bulk density is 1560kg / m 3 ; Barite particle size is 5-10mm continuous gradation, apparent density is 435...

Embodiment 2

[0056] Embodiment 2: A kind of heat-resistant concrete is prepared by the following method:

[0057] S1: Soak the slag fine aggregate in water for 36 hours at a temperature of 20°C;

[0058] S2: 120kg cement, 970.6kg basalt crushed stone, 19.4kg barite crushed stone, 530kg water slag, 150kg ceramic powder, 170kg mineral powder, 80kg fly ash, 2kg calcium formate, 2kg sodium silicate, 4kg early strength type Polycarboxylate water-reducer and 170kg of water are mixed and stirred evenly to obtain a mixture;

[0059] S3: Pour the mixture into the mold, and let it be naturally cured for 10 hours to obtain heat-resistant concrete.

[0060] Among them, the cement is ordinary Portland cement of P.O.42.5; the particle size of the basalt crushed stone is 5-10mm continuous gradation, and the apparent density of the crushed stone is 2830kg / m 3 , the loose bulk porosity is 45%, and the loose bulk density is 1560kg / m 3 ; Barite particle size is 5-10mm continuous gradation, apparent densit...

Embodiment 3

[0061] Embodiment 3: A kind of heat-resistant concrete is prepared by the following method:

[0062] S1: Soak the slag fine aggregate in water for 24 hours at a temperature of 22°C;

[0063] S2: 140kg cement, 990.2kg basalt crushed stone, 19.8kg barite crushed stone, 540kg water slag, 170kg ceramic powder, 180kg mineral powder, 90kg fly ash, 3kg calcium formate, 3kg sodium silicate, 5kg early strength type Polycarboxylate water-reducer and 180kg of water are mixed and stirred evenly to obtain a mixture;

[0064] S3: Pour the mixture into the mold, and let it be naturally cured for 20 hours to obtain heat-resistant concrete.

[0065] Among them, the cement is ordinary Portland cement of P.O.42.5; the particle size of the basalt crushed stone is 5-10mm continuous gradation, and the apparent density of the crushed stone is 2830kg / m 3 , the loose bulk porosity is 45%, and the loose bulk density is 1560kg / m 3 ; Barite particle size is 5-10mm continuous gradation, apparent densit...

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Abstract

The invention discloses heat-resistant concrete and a preparation method thereof and belongs to the technical field of concrete. According to key points of the technical scheme, the heat-resistant concrete comprises the following components in parts by weight: cement, coarse aggregate, fine aggregate, ceramic ultrafine powder, mineral powder, fly ash, an early strength agent, a water reducing agent and water. The coarse aggregate refers to basalt gravel and barite gravel; the fine aggregate refers to grain slag; the early strength agent comprises calcium formate and sodium silicate; the waterreducing agent comprises an early strength polycarboxylic water reducer. By replacing medium sand with grain slag, the grain slag can be effectively utilized, the long-term strength of the concrete can be improved, the heat resistance of the concrete is improved by the basalt gravel, the barite gravel and the ceramic ultrafine powder, the defects that low early strength of the concrete is broughtby the grain slag and the water demand is large can be overcome through the early strength agent and the water reducing agent, the compactness of the concrete is improved, and the compressive strengthof the concrete is improved.

Description

technical field [0001] The invention relates to the technical field of concrete, more specifically, it relates to a heat-resistant concrete and a preparation method thereof. Background technique [0002] With the development of the construction industry and the increasing emphasis on the quality of construction projects, the quality and quantity of construction sand, which is one of the basic components of concrete and mortar, has an increasingly obvious impact on the construction industry. On the one hand, the market has higher and higher requirements for the quality of sand, and the quantity is increasing; on the other hand, natural sand resources that meet the quality requirements are becoming less and less. Limitation, looking for substitutes for natural sand is a current research hotspot. [0003] In recent years, my country's crude steel production has gradually increased. Every ton of crude steel produced will produce about 400kg of water slag. At present, water slag...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B18/142C04B14/14C04B14/368C04B18/023C04B18/12C04B18/08C04B24/04C04B12/04C04B24/24
Inventor 陈连义金海军李强王丽丽李永新
Owner 北京建工新型建材有限责任公司
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