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High compact bidirectionally adjustable concrete and its uses

A concrete, densification technique used in the field of concrete

Inactive Publication Date: 2007-08-01
上海市建筑构件制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this construction method has brought new challenges to the technical performance of concrete materials. The concrete in different parts of the base must not only meet the requirements of no flow or low flow after spraying, but also have sufficient initial setting time to ensure the consistency with the surface concrete. Structural connection, the surface concrete must not only ensure that it does not flow, but also have enough time to form and plaster the surface, that is, the concrete must have the performance of two-way adjustable coagulation, and the hardened concrete must meet the requirements of high density and abrasion resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Formula: the parts by weight of base concrete are:

[0025] 1 part of cement, 0.32 parts of fly ash, 0.06 parts of silica fume, 0.018 parts of high-performance concrete admixture (polycarboxylate ether polymer, grade RHEOPLUS 25), 2.32 parts of medium sand, 1.68 parts of 5-16 gravel, 0.42 parts of tap water, 0.013 parts of concrete accelerator (MEYCO SA160, the main component is calcium aluminate), 0.0013 parts of polypropylene fiber with a fiber length of 12 mm and a diameter of 18 μm;

[0026] The parts by weight of the surface layer concrete are:

[0027] 1 part of cement, 0.22 parts of fly ash, 0.07 parts of silica fume, 0.018 parts of high-performance concrete admixture (polycarboxylate polymer, grade RHEOPLUS 25), 2.07 parts of medium sand, 1.49 parts of 5-16 gravel, 0.42 parts of tap water, 0.0015 parts of polypropylene fibers with a fiber length of 12 mm and a diameter of 18 μm;

[0028] Construction method:

[0029] After the base concrete and surface concre...

Embodiment 2

[0032] Formula: the parts by weight of base concrete are:

[0033] 1 part of cement, 0.32 parts of fly ash, 0.06 parts of silica fume, 0.018 parts of high-performance concrete admixture (polycarboxylate ether polymer, grade RHEOPLUS 25), 2.32 parts of medium sand, 1.68 parts of 5-16 gravel, 0.42 parts of tap water, 0.014 parts of concrete accelerator (MEYCO SA160, the main component is calcium aluminate), 0.0013 parts of polypropylene fiber with a fiber length of 12 mm and a diameter of 18 μm;

[0034] The parts by weight of the surface layer concrete are:

[0035] 1 part of cement, 0.22 parts of fly ash, 0.07 parts of silica fume, 0.018 parts of high-performance concrete admixture (polycarboxylate polymer, grade RHEOPLUS 25), 2.07 parts of medium sand, 1.49 parts of 5-16 gravel, 0.42 parts of tap water, 0.0015 parts of polypropylene fibers with a fiber length of 12 mm and a diameter of 18 μm;

[0036] Construction method:

[0037]After the base concrete and surface concret...

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Abstract

The invention discloses a high-compact bidirectional adjustable concrete and application, which comprises the following parts: 1% PII 52.5, 0.20-0.35% II-grade low-calcium coal ash, 0.05-0.08% wollastonite, 0.015-0.020% high-property polycarboxylic acid additive, 0.0012-0.0020% polypropylene fiber, 2.00-0.32% medium sand, 1.40-1.70% crushed stone, 0.38-0.45% water and 0-0.016% concrete accelerator. The invention is fit for spraying and casting on the large-smooth curve, which satisfies quality standard.

Description

technical field [0001] The invention relates to a kind of concrete, in particular to a kind of concrete which can be applied to the concrete structure molding of large smooth curved surface (including concave surface and convex surface). Background technique [0002] With the continuous improvement of modern people's spiritual and material life needs and the continuous development of building construction technology, one of the development trends of the structural modeling of buildings or structures is refinement and complexity, and reinforced concrete structures are still the most important in the world. structure type. Among them, the design and construction of high-precision smooth large-curved concrete structures have brought new challenges to concrete material science. [0003] In the past concrete technology, high-precision molds are generally used for the construction of concrete forming surfaces that require high precision. The performance requirements for the fresh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/08C04B24/24C04B14/02C04B16/06B28B1/24
CPCC04B2111/00155C04B2111/00336C04B28/02Y02W30/91C04B14/06C04B16/0633C04B18/08C04B18/146C04B20/0076C04B24/2641C04B2103/10
Inventor 朱敏涛邢弘王锦明冯为民
Owner 上海市建筑构件制品有限公司
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