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Prefabricated duplex block concrete construction mixing ratio and manufacturing technology thereof

A concrete and mix ratio technology, which is applied in the field of prefabricated double block concrete construction mix ratio, can solve the problems of insufficient concrete vibration, large temperature difference between inside and outside, and unreasonable layering, so as to delay the time of thermal insulation temperature rise and reduce thermal insulation The effect of temperature rise and prolonged stirring time

Inactive Publication Date: 2017-07-25
CCCC TIANJIN DREDGING HARBOR CONSTR ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional prefabricated double block has the following common quality problems: 1. The concrete is not properly vibrated, and there are many air bubbles due to unreasonable layering; 2. The heat of hydration of the concrete causes a large temperature difference between the inside and outside, resulting in temperature cracks or cracks

Method used

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  • Prefabricated duplex block concrete construction mixing ratio and manufacturing technology thereof

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Embodiment Construction

[0028] In order to further understand the content of the invention, features and effects of the present invention, the following examples are hereby given:

[0029] A construction mix ratio of prefabricated double-joint block concrete, which adopts the raw materials in the following proportions and is evenly mixed by a concrete mixer, with a bulk density of 2300-2500kg / m 3 ; The specific mix ratio is: cement: 350 ~ 370kg / m 3 ;Sand: 770~790kg / m 3 ;gravel 1 : 620~650kg / m 3 ;gravel 2 : 415~435kg / m 3 ;Polycarboxylate high-performance water reducer: 8.80~9.20kg / m 3 ; Fly ash: 60~80kg / m 3 ;Water: 160~170kg / m 3 .

[0030] The present invention can also adopt following technical measures:

[0031] The strength grade of the cement is P.042.5, and its specific surface area is 300-350㎡ / kg.

[0032] The sand is medium sand with a fineness modulus of 2.4-2.9 and a mud content of less than 3%.

[0033] The gravel 1 Grain gradation is 10-20mm, gravel 2 The particle gradation is ...

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Abstract

The invention relates to a prefabricated duplex block concrete construction mixing ratio which is prepared by uniformly stirring the following raw materials according to the following ratio through a concrete stirring machine, wherein the bulk density is 2300-2500kg / m<3>, and the specific mixing ratio is as follows: 350-370kg / m<3> of cement, 770-790kg / m<3> of sand, 620-650kg / m<3> of broken stones 1, 415-435kg / m<3> of broken stones 2, 8.80-9.20kg / m<3> of a polycarboxylic high-performance water reducer, 60-80kg / m<3> of fly ash and 160-170kg / m<3> of water. A manufacturing technology comprises the following steps: sequentially adding the broken stones 1, the broken stones 2, the cement, the fly ash, the sand and the water in a stirring tank, and finally adding the polycarboxylic high-performance water reducer; and stirring for 90-120s after addition is finished, and finally forming a mixture with the 28d strength greater than or equal to 40MPa, the collapsing degree being 140-160mm and the out-of-machine temperature of a mixture lower than 30 DEG C. The prefabricated duplex block concrete construction mixing ratio can solve the problem of concrete quality such as concrete bubbles, cracking, cracks or the like and is suitable for regions with the temperature being 30-40 DEG C.

Description

technical field [0001] The invention belongs to the technical field of concrete mix ratio, and in particular relates to a construction mix ratio of prefabricated double-joint block concrete suitable for a temperature range of 30-40 DEG C and a manufacturing process thereof. Background technique [0002] With the development of ocean blue economy and the progress of society, the durability and environmental protection requirements of concrete are getting higher and higher. In order to meet the protection of offshore breakwaters and enhance the wave dissipation effect of the armor block, the application of prefabricated double-joint blocks is becoming more and more extensive. However, the traditional prefabricated double blocks have the following common quality problems: 1. The concrete is not vibrated properly, and there are many air bubbles due to unreasonable layering; 2. The heat of hydration of the concrete causes a large temperature difference between the inside and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B22/00
CPCC04B22/002C04B28/04C04B2201/20C04B2201/50C04B14/06C04B18/12C04B2103/302C04B18/08
Inventor 岳吉双宋俊强刘文代君胜张远颜良评
Owner CCCC TIANJIN DREDGING HARBOR CONSTR ENG
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