Low-creep C60 high-performance concrete

A high-performance concrete, low-creep technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of increased prestress loss, etc., to achieve the effect of ensuring economical efficiency and excellent durability

Inactive Publication Date: 2010-11-24
CHINA RAILWAY HI TECH IND CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] 3. For prestressed concrete structures, the creep of concrete greatly increases the loss of prestress, which is extremely unfavorable. Therefore, prestressed structures generally require higher concrete strength grades to reduce creep and loss of prestress

Method used

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Embodiment

[0045] In this example, according to the raw material composition described in the summary of the invention, 6 experimental groups of concrete were prepared, and the ratio data of each group are shown in Table 1.

[0046] Table 1 Low creep C60 high performance concrete mix ratio

[0047]

[0048] Guangxi China Resources 42.5 ordinary Portland cement is used for the cement in the above-mentioned cementitious materials, the fly ash is Class I fly ash of Taishan Power Plant, and the mineral powder is S95 finely ground mineral powder of Dongguan China Resources Cement Plant. See Table 2-4 for the technical indicators of cement, fly ash and slag used.

[0049] Admixture: JM-PCA(I) polycarboxylate high-efficiency water reducer produced by Jiangsu Bote New Material Co., Ltd., which has good compatibility with cement and other cementitious materials.

[0050] Table 2 The main technical indicators of Guangxi China Resources 42.5 cement

[0051]

[0052] Table 3 Main technical ind...

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Abstract

The invention discloses a low-creep C60 high-performance concrete material. Economic and reasonable 42.5 normal portland cement or portland cement is selected, and technologies of mixing grade I fly ash and grade S95 mineral powder, adding a polycarboxylic acid superplasticizer, and the like are adopted, thereby optimizing the proportioning of concrete, ensuring the economy and good placeability and mechanical property of concrete with low water to binder ratio, avoiding concrete cracking caused by low water to binder ratio, ensuring high durability of the concrete, effectively reducing the creep of concrete, reducing the prestressing loss, and ensuring the safety of the concrete structure.

Description

technical field [0001] The invention relates to a building concrete material, in particular to a low-creep high-performance concrete material. Background technique [0002] High-performance concrete takes durability as the main index of design, and guarantees the performance of durability, workability, applicability, strength, volume stability and economy according to the requirements of different uses. For this reason, the configuration of high-performance concrete is characterized by the use of low water-binder ratio, the selection of high-quality raw materials, and the addition of sufficient quantities of mineral fine admixtures and high-efficiency admixtures. High-performance concrete can adapt to the development of modern engineering in the direction of large spans, heavy loads, towering towers and harsh environmental conditions, and meets the requirements of modern construction technology using industrial production (factory ready-mixed concrete, factory prefabricated ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B28/04
CPCC04B28/04Y02W30/91C04B14/02C04B14/06C04B18/08C04B18/141C04B24/2641C04B2103/302
Inventor 张利平王昌萍侯小林李志刚汪德才贺方平熊泽伦朱乾陈扬名
Owner CHINA RAILWAY HI TECH IND CORP LTD
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