Environment-friendly bare concrete and preparation method thereof
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A fair-faced concrete, environmentally friendly technology, applied in the field of concrete, can solve the problems of air bubbles and chromatic aberration, achieve the effect of bright and uniform color, improve appearance and reduce chromatic aberration
Inactive Publication Date: 2018-07-06
CCCC SHANGHAI HARBOR ENG DESIGN & RES INST +1
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[0005] For above-mentioned shortcoming or deficiency of prior art, the technical problem to be solved in the present invention is to provide a kind of environment-friendly type clear-faced concrete and preparation method thereof, the technology of the present invention is simple, not only tunnel slag is applied to the preparation of clear-faced concrete, does not cause The decline in quality can also solve the defects such as a large number of air bubbles and color difference on the surface of fair-faced concrete
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Embodiment 1
[0020] An environment-friendly fair-faced concrete, including machine-made sand, cementitious material, admixture, water and gravel. Weigh the raw materials according to the weight ratio of the following components: machine-made sand 731kg / m 3 , cement 249kg / m 3 , Mineral powder 184kg / m 3 , silicon powder 18.6kg / m 3 With fine microbeads 28.4kg / m 3 , gravel 1032kg / m 3 , Polycarboxylate superplasticizer 5.6kg / m 3 , water 149kg / m 3 .
[0021] The preparation method of environment-friendly fair-faced concrete is as follows:
[0022] 1) According to the relevant requirements of fair-faced concrete and the relevant specifications of concrete design, determine the mix ratio of environment-friendly clear-water concrete described in this embodiment, wherein:
[0023] Machine-made sand 731kg / m 3 , cement 249kg / m 3 , Mineral powder 184kg / m 3 , silicon powder 18.6kg / m 3 With fine microbeads 28.4kg / m 3 , gravel 1032kg / m 3 , Polycarboxylate superplasticizer 5.6kg / m 3 , water ...
Embodiment 2
[0029] An environment-friendly fair-faced concrete, including tunnel slag, cementitious material, admixture, water and gravel. Weigh raw materials according to the following component weight ratio: tunnel slag 724kg / m 3 , Cement 335kg / m 3 , mineral powder 98kg / m 3 , silicon powder 13.8kg / m 3 With fine microbeads 33.2kg / m 3 ; Gravel 1059kg / m 3 ;Composite water reducer 5.9kg / m 3 , of which polycarboxylate superplasticizer 5.37kg / m 3 , defoamer 0.06kg / m 3 , air-entraining agent 0.18kg / m 3 , tackifier 0.29kg / m 3 ; Water 146kg / m 3 .
[0030] The preparation method of present embodiment environment-friendly type fair-faced concrete is as follows:
[0031] 1) According to the relevant requirements of fair-faced concrete and the relevant specifications of concrete design, the mix ratio of the environment-friendly clear-water concrete described in this embodiment is determined, wherein the tunnel slag is 724kg / m 3 , Cement 335kg / m 3 , mineral powder 98kg / m 3 , silicon pow...
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Abstract
The invention discloses environment-friendly bare concrete. The environment-friendly bare concrete comprises 645-790 kg / m<3> of machine-made sand, 385-495 kg / m<3> of a cementing material, an additivewhich is 8%-16% of the weight of the cementing material, water which is 30%-38% of the weight of the cementing material, and 990-1150 kg / m<3> of gravels. A preparation method of the environment-friendly bare concrete comprises the following steps: determining a mixing proportion of various materials for forming the environment-friendly bare concrete; adding the additive, the cementing material, 60%-70% of the water and the machine-made sand into an agitator and stirring for 10-20 s, and uniformly stirring; adding the gravels into the agitator and continuously mixing for 15-20 s; adding the rest water into the agitator and continuously stirring, wherein the total stirring time is kept within 150 s; and after mixing, obtaining the environment-friendly bare concrete. The technology of the environment-friendly bare concrete is simple, tunnel hole slags are adequately recycled, the resources are saved, and the environment is protected. In addition, through adding silicon powder and fine microspheres, the appearance of the bare concrete is improved, and the surface of the bare concrete is more clean and beautiful.
Description
technical field [0001] The invention belongs to the technical field of concrete, and in particular relates to an environment-friendly fair-faced concrete and a preparation method thereof. Background technique [0002] On the one hand, with the further extension of my country's railways and highways to the western region, not only the number and total length of tunnels will continue to increase, but also more and more road tunnels longer than 10km and railway tunnels longer than 20km, and extra-long tunnels will become "new" normal". Therefore, the tunnel slag produced by these super-long tunnels will also increase year by year. How to deal with these tunnel slags is of great significance to the establishment of a resource-saving and environment-friendly society in our country. At present, for the treatment of tunnel slag, my country often discards it as waste slag, which not only occupies land but also affects the environment. In engineering applications, my country usually ...
Claims
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Application Information
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