C180 strength-grade concrete for formed steel concrete composite structure

A technology of strength grade and combined structure, applied in the field of building materials, can solve the problems of poor natural bonding performance, poor natural bonding performance between steel and ultra/ultra-high-strength high-performance concrete, etc., and achieve good compatibility and remarkable construction quality Improvement effect, effect of improving natural bonding performance

CN103553458BInactive Publication Date: 2015-06-10XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2015-06-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a C180 strength-grade concrete for a formed steel concrete composite structure, which is composed of 446 parts of cement, 828 parts of fine aggregate, 1077 parts of coarse aggregate, 94.8 parts of water, 17 parts of concrete superplasticizer, 1 part of defoaming agent, 82 parts of silicon powder, 116 parts of expanding agent, 7 parts of activator and 36 parts of expanding agent. The preparation method comprises the following steps: blending the concrete superplasticizer and activator into weighed water to obtain a mixture, sequentially adding the fine aggregate and 1 / 3 of the mixture into a stirrer according to parts by weight, and stirring; adding the coarse aggregate and 1 / 3 of the mixture, and stirring; adding the cement, expanding agent, silicon powder and fly ash, and stirring; and adding the defoaming agent and the rest of mixture, stirring and discharging. The concrete can obviously improve the bonding property between the formed steel and the concrete in a natural state, effectively displays the respective mechanical properties and the synergic working performance of the steel and concrete, greatly enhances the loading capacity, service performance and durability of the structural member, and has high volume stability and economical efficiency.
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Description

technical field

[0001] The invention belongs to the technical field of building materials, and relates to super / ultra-high-strength high-performance concrete with a strength grade of C180 for steel-concrete composite structures. Background technique

[0002] The invention of Portland cement in 1824 led to the rapid development of concrete technology. Its consumption is large and its scope of application ranks the highest in the world. Although concrete is a traditional man-made building material, because of its irreplaceable advantages (abundant raw materials, simple production process, high cost performance, etc.) and the continuous progress of concrete material science and technology, concrete has become the main body of civil engineering materials. , It will also be one of the indispensable main materials in future civil engineering and national construction. At the same time, with the continuous expansion of the city, the continuous increase of the population, the conti...

Examples

Embodiment

[0050] (1) Raw materials

[0051] 1. Cement

[0052] Select Qinling brand P·O62.5R cement with stable quality and good performance, and conduct an adaptability test with polycarboxylate concrete superplasticizer before use. The test method adopts the current building materials industry standard "Cement and Reducer Water agent compatibility test method "JC / T1083-2008 method, good compatibility with polycarboxylate concrete superplasticizer. The performance indicators of the selected cement meet the requirements of the relevant current national standards, and its alkali content is low, its heat of hydration is low, and its water demand is also low.

[0053] 2. Aggregate

[0054] The fine aggregate adopts medium-to-coarse and Bahe sand with smooth particles, hard texture, and good gradation. The quality of the sand conforms to the current building material industry standard "Sand and Stone Quality and Inspection Method Standard for Ordinary Concrete" JC / T52-2006 and the nationa...