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SP prestressed hollow slab

A hollow slab and prestressed technology, applied in the field of building panels, can solve the problem that the ratio of SP prestressed hollow slabs does not meet the domestic process requirements, and achieve the effect of meeting economical indicators and reducing production costs

Inactive Publication Date: 2017-05-10
SHANGHAI CITI RAISE CONSTR GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a kind of SP prestressed hollow slab in order to overcome the defect that the proportion of SP prestressed hollow slab conventionally adopted in the prior art does not meet the domestic technological requirements.

Method used

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  • SP prestressed hollow slab

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Embodiment Construction

[0018] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below.

[0019] In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways than those described here, so the present invention is not limited by the specific embodiments disclosed below.

[0020] One embodiment of the present invention discloses a SP prestressed hollow slab, which is made of dry hard fine stone concrete. According to the special requirements of the concrete used in the SP prestressed hollow slab and the main factors affecting the strength, the invention meets the production and use requirements of the SP slab, ensures that the strength of the concrete reaches the requirements in 28 days and meets the requirements of relaxation, and the strength in three...

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Abstract

The invention provides an SP prestressed hollow slab. The SP prestressed hollow slab is prepared from dry and hard fine aggregate concrete, the dry and hard fine aggregate concrete comprises cement, sand, broken stone and water, in per square meter of the dry and hard fine aggregate concrete, the ratio of the cement to the sand is 1: (3.75-3.91), the ratio of the cement to the broken stone is 1: (2.02-2.17), and the ratio of the cement to the water is 1: (0.38-0.4). The SP prestressed hollow slab has specific ratio, can meet actual technological requirements and can meet economical indexes of the concrete; and meanwhile, production cost can be reduced.

Description

technical field [0001] The invention relates to the field of building boards, in particular to an SP prestressed hollow board. Background technique [0002] SP prestressed hollow slab is a concrete prestressed structural component, which has many advantages such as environmental protection, energy saving, sound insulation, earthquake resistance, and flame retardancy. [0003] In the prior art, the SP prestressed concrete hollow slab adopts dry hard fine stone concrete with concrete strength grades of C40, C45, and C50. The SP prestressed concrete hollow slab uses high-strength and low-relaxation steel strands as the main prestressed reinforcement, and uses an extrusion machine to punch and extrude dry hard concrete with a special ratio. Due to the special production process of SP prestressed concrete hollow slabs, new requirements are put forward for some performance indicators such as concrete compactness and early strength. [0004] The sand rate of SP board usually reac...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00
CPCC04B28/00
Inventor 陈培良汪廷秀陆智倍李康
Owner SHANGHAI CITI RAISE CONSTR GRP