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Early strength concrete and preparation method thereof

A concrete and super early strength technology, applied in the field of concrete engineering, can solve problems such as road blockage, vehicle transportation interruption, long maintenance time, etc., and achieve the effect of improving early strength, improving reactivity, and developing well.

Active Publication Date: 2013-12-25
北京中联新航建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is that in the prior art, when building, rebuilding, and expanding large-area concrete road traffic pavement, the maintenance time of ordinary concrete for construction is long, which leads to interruption of vehicle transportation and road blockage during the maintenance period, causing great harm to residents. In order to provide a low-cost ultra-early-strength concrete for roads that can meet the requirements of early traffic opening

Method used

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  • Early strength concrete and preparation method thereof

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Effect test

Embodiment 1

[0036]Calculated per cubic meter of super-early-strength concrete, the amount of raw materials added is: 470kg of cementitious material, of which 409kg for ordinary Portland cement P.O42.5 in the gelatinous material, 41kg for glass powder, and 20kg for silica fume , the aggregate is 1650kg, the sodium hydroxide in the composite activator is 0.47kg, the triethanolamine is 0.094kg, the polycarboxylate superplasticizer is 2.35kg, the water-binder ratio is 0.20, and the aggregate sand rate is 30%;

[0037] The preparation method of geopolymer concrete described in the present embodiment comprises the steps:

[0038] (1) adding the gelling material and sodium hydroxide into the mixer and stirring for 60s to obtain the gelling material mixture;

[0039] (2) Add a specific amount of aggregate to the uniformly stirred cementitious material mixture in the step (1), and stir for 30 seconds;

[0040] (3) Add triethanolamine, water reducing agent and water to the uniformly stirred mixtur...

Embodiment 2

[0042] Calculated per cubic meter of super early strength concrete, the amount of raw materials added is: 500kg of cementitious material, of which 420kg for ordinary Portland cement P.O42.5 in the gelatinous material, 50kg for glass powder, and 30kg for silica fume , the aggregate is 1680kg, the sodium hydroxide in the composite activator is 1.0kg, the triethanolamine is 0.15kg, the polycarboxylate superplasticizer is 5.0kg, the water-binder ratio is 0.22, and the aggregate sand rate is 31%;

[0043] The preparation method of geopolymer concrete described in the present embodiment comprises the steps:

[0044] (1) adding the gelling material and sodium hydroxide into the mixer, and stirring for 75s to obtain the gelling material mixture;

[0045] (2) Add a specific amount of aggregate to the uniformly stirred cementitious material mixture in the step (1), and stir for 34 seconds;

[0046] (3) Add triethanolamine, water reducing agent and water to the uniformly stirred mixture...

Embodiment 3

[0048] Calculated per cubic meter of super early strength concrete, the amount of raw materials added is: 530kg of cementitious material, of which 424kg for ordinary Portland cement P.O52.5 in the gelatinous material, 64kg for glass powder, and 42kg for silica fume , the aggregate is 1700kg, the sodium hydroxide in the composite activator is 1.59kg, the triethanolamine is 0.21kg, the polycarboxylate superplasticizer is 6.36kg, the water-binder ratio is 0.24, and the aggregate sand rate is 33%;

[0049] The preparation method of geopolymer concrete described in the present embodiment comprises the steps:

[0050] (1) adding the gelling material and sodium hydroxide into the mixer, and stirring for 70s to obtain the gelling material mixture;

[0051] (2) Add a specific amount of aggregate to the cementitious material mixture stirred uniformly in the step (1), and stir for 36 seconds;

[0052] (3) Add triethanolamine, water reducing agent and water to the uniformly stirred mixtu...

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Abstract

The invention provides early strength concrete and a preparation method thereof and belongs to the technical field of concrete engineering. The early strength concrete is prepared from the following raw materials: a gelling material, aggregate, a compound additive and water, wherein the gelling material comprises ordinary portland cement, glass powder and silica fume; the aggregate comprises stones and sand; the compound additive comprises triethanolamine, sodium hydroxide and a polycarboxylate superplasticizer. The preparation method of the early strength concrete comprises the following steps: uniformly stirring a gelling material with sodium hydroxide to obtain a mixture, wherein the gelling material comprises cement, glass powder and silica fume; adding the stones and the sand into the mixture, and uniformly stirring; sequentially adding triethanolamine, a superplasticizer and water into the uniformly stirred material, and uniformly stirring, thereby preparing the early strength concrete. The early strength concrete prepared by adopting the preparation method has the advantages of short curing time and high early strength.

Description

technical field [0001] The invention relates to a super-early-strength concrete and a preparation method thereof, belonging to the technical field of concrete engineering. Background technique [0002] The existing road pavement mainly has two forms of cement concrete pavement and asphalt pavement, wherein the cement concrete pavement accounts for about 60% of the existing road pavement. With the continuous development of my country's economy and the continuous acceleration of urbanization, in the future, my country will build more cement concrete pavement roads to meet the needs of residents' lives and economic development. [0003] However, cement concrete pavement has its own disadvantages compared with asphalt pavement: due to the low early strength of concrete, it generally takes 14 to 21 days of moisturizing and curing after paving before the strength can meet the requirements of road traffic. The interruption of transportation and road blockage have brought great inc...

Claims

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Application Information

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IPC IPC(8): C04B28/04
Inventor 贾伟进聂法智孙占兴
Owner 北京中联新航建材有限公司
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