Anti-freezing premixed concrete without concrete anti-freezing agent and processing method thereof

A technology of ready-mixed concrete and processing methods, applied in the field of ready-mixed concrete construction, can solve problems such as economic loss, impact on concrete durability, service life discount of concrete and engineering structures, etc., to save engineering costs, reduce concrete moisture content, ensure The effect of construction safety

Inactive Publication Date: 2021-10-15
中铁二十一局集团第二工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, due to the chemical action of the antifreeze, on the one hand, the durability of the concrete is affected; Countries and regions bring economic losses

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Prepare raw materials according to the following parts by weight: gravel 1010, sand 730, cement 330, fly ash 80, water reducing agent 4.0 and water 120;

[0022] Follow the steps below to process:

[0023] S1: Heat the mixing water to 45°C;

[0024] S2: heating gravel and sand to 10°C;

[0025] S3: Insulate cement, fly ash and water reducing agent to ensure that they are used under positive temperature conditions;

[0026] S4: Add the above-mentioned heated and heat-preserved raw materials into a mixer and mix them evenly for 70 seconds;

[0027] S5: Take the mixed concrete out of the machine at 14°C;

[0028] S5: According to the prior art, pump the concrete slurry to the pouring target for the next step of construction.

[0029] The cement is preferably Portland cement, and the fly ash specification adopts F class II with a fineness of 19% and a water demand ratio of 99%. The sand is preferably class II medium sand with a fineness modulus of 2.8 and a mud content ...

Embodiment 2

[0031] Prepare raw materials according to the following parts by weight: gravel 1080, sand 750, cement 345, fly ash 85, water reducing agent 4.3 and water 130;

[0032] Follow the steps below for construction:

[0033] S1: Heat the mixing water to 45°C;

[0034] S2: heating gravel and sand to 10°C;

[0035] S3: Insulate cement, fly ash and water reducing agent to ensure that they are used under positive temperature conditions;

[0036] S4: Add the above-mentioned heated and heat-preserved raw materials into a mixer and mix them evenly for 70 seconds;

[0037] S5: Take the mixed concrete out of the machine at 14°C;

[0038] S5: According to the prior art, pump the concrete slurry to the pouring target for the next step of construction.

Embodiment 3

[0040] Prepare raw materials according to the following parts by weight: gravel 1100, sand 770, cement 370, fly ash 90, water reducing agent 4.5 and water 155;

[0041] Follow the steps below for construction:

[0042] S1: Heat the mixing water to 45°C;

[0043] S2: heating gravel and sand to 10°C;

[0044] S3: Insulate cement, fly ash and water reducing agent to ensure that they are used under positive temperature conditions;

[0045] S4: Add the above-mentioned heated and heat-preserved raw materials into a mixer and mix them evenly for 70 seconds;

[0046] S5: Take the mixed concrete out of the machine at 14°C;

[0047] S5: According to the prior art, pump the concrete slurry to the pouring target for the next step of construction.

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Abstract

The invention discloses anti-freezing premixed concrete without a concrete anti-freezing agent and a processing method thereof, and belongs to the technical field of premixed concrete construction. The raw materials comprise, in parts by weight, 1010-1100 parts of broken stone, 730-770 parts of sand, 330-370 parts of cement, 80-90 parts of fly ash, 4.0-4.5 parts of a water reducing agent, and 120-155 parts of water, the engineering cost is saved, and the construction safety, the engineering progress, and the engineering quality are ensured.

Description

technical field [0001] The invention relates to the technical field of ready-mixed concrete construction, in particular to an antifreeze ready-mixed concrete without concrete antifreeze and a processing method thereof. Background technique [0002] The average altitude of the Qinghai-Tibet Plateau is 4000m. Due to the high transparency of the atmosphere, the annual sunlight radiation value is as high as 5850-7950MJ / m 2 , strong wind and sand, low air humidity, and strong ultraviolet rays, resulting in extreme weather such as positive and negative alternating day and night temperatures in this area, which brings great difficulties to construction projects in this area, especially concrete construction. [0003] Jiegu Town, Yushu Prefecture, Qinghai is located in the eastern part of the Qinghai-Tibet Plateau, the easternmost part of Yushu Tibetan Autonomous Prefecture, with an average altitude of 4493.4 meters, and the terrain is dominated by mountainous plateaus; it belongs t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/20C04B2201/50C04B18/12C04B14/06C04B18/08C04B2103/302
Inventor 芦志平张文祥姜胜利柴生虎朱冠生臧守旺孙钊蒙悟魏鹏赵东李平菊张志贤李存存
Owner 中铁二十一局集团第二工程有限公司
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