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Concrete and construction process thereof

A construction technique and concrete technology, which is applied in the field of civil engineering, can solve problems such as waste of resources and energy, and achieve the effects of cost reduction, easy temperature control, and significant economic benefits

Inactive Publication Date: 2018-04-03
安徽金兄弟环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Premature deterioration, cracking and destruction of concrete structures is also a huge waste of resources and energy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Each component cement in a kind of concrete and its construction technology: coarse aggregate: fine aggregate: the weight ratio of water is 1:3.23:2.1:0.5; Wherein cement is pozzolanic cement, concrete index is magnesium oxide weight The percentage content is less than or equal to 5%, the weight percentage of sulfur trioxide is less than or equal to 3.5%, the weight percentage of alkali is less than or equal to 0.6%, and the loss on ignition is less than or equal to 5%. The remaining is less than or equal to 10%, the initial setting time of cement is not earlier than 45min, and the final setting time is not later than 10h; the coarse aggregate is continuously graded stones with a particle size of 20mm, and the weight percentage of mud content is less than 1%. The weight percentage content is less than 0.5%, the weight percentage content containing needle-like and / or flake-like particles is less than 10%, the porosity is less than 40%, the crushing index is not more than ...

Embodiment 2

[0020] Embodiment 2 Each component cement in the mass concrete that is beneficial to control temperature and shrinkage crack: coarse aggregate: fine aggregate: the weight ratio of water is 1:3.1:2.3:0.45; Wherein cement is slag cement, The specific indicators are that the weight percentage of magnesium oxide is less than or equal to 5%, the weight percentage of sulfur trioxide is less than or equal to 3.5%, the weight percentage of alkali is less than or equal to 0.6%, the loss on ignition is less than or equal to 5%, and the mesh size is 80um. The sieve residue of the square hole sieve is less than or equal to 10%, the cement initial setting time is not earlier than 45min, the final setting time is not later than 10h, and other component indexes are the same as in Example 1.

Embodiment 1

[0021] The component of concrete in embodiment 1 and embodiment 2 can also mix fly ash and admixture, the mixing quality of described fly ash is 20% of cement quality in the component, the mixing quality of described admixture It is 1% of the mass of cement in the component; the crack resistance effect of concrete mixed with fly ash and admixture is better.

[0022] The following is a specific application example of a kind of concrete and its construction technology of the present invention, which is used to prove that the present invention can effectively control the temperature and effectively reduce the technical effect of shrinkage cracks: Test example 1 A commercial and logistics building in Nanning City, 5 floors underground, above ground 50 floors, building height 231.95m, the minimum thickness of the lower deck of the main tower core tube is 3.35m, the maximum thickness is 7.8m, the concrete strength grade is C40, and the pouring volume is 9000m 3 , which belongs to the...

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Abstract

The invention relates to a concrete and its construction technology. The weight proportion of each component of the mass concrete is cement: coarse aggregate: fine aggregate: water: 1:3~3.5:2~2.3:0.45~0.55; construction method ①Trial mix; ②Concrete cubic compressive strength test; ③After passing the test, mix the concrete raw materials according to the materials selected in the trial mix and the components in the mix ratio; , step by step, one time to the top" pouring method, and adopt the second vibration method; arrange three vibrating air concrete in the front, middle and back of each layer of concrete for vibration; ⑤ After the final setting of the concrete, cover the plastic film and / or cover One layer of 1cm thick sacks and / or watering and curing, the curing time must not be less than 14 days; 6. arrange temperature measuring points respectively at the vertical height of concrete pouring, the edge and the middle of the surface and adopt thermocouple thermometers to measure the temperature, the present invention has time The advantages of controllability and high crack resistance.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to concrete and its construction technology. Background technique [0002] With the rapid development of civil engineering construction, concrete has become the largest and most widely used engineering material in the world today. During the use of concrete, it is eroded by harmful media in the soil, water and air, as well as the physical and chemical effects of the harmful components of the concrete material itself, which will cause cracking and peeling, which will further aggravate the occurrence and development of other hazards. How to slow down and reduce the cracking of concrete is very important to the safety, applicability and durability of concrete structures. Premature deterioration, cracking and destruction of concrete structures are also a huge waste of resources and energy. Therefore, the problem of concrete cracking is deeply valued by relevant scientific re...

Claims

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Application Information

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IPC IPC(8): C04B28/08C04B28/02
CPCC04B28/08C04B28/02C04B28/021C04B14/02C04B14/06
Inventor 马安岭
Owner 安徽金兄弟环保科技股份有限公司
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