Study on the Preparation and Properties of a Novel Photocatalytic Foam Concrete

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Fu Shifeng^{1,2}, Zhang Guangtian^{3,4}, Song Yang^{5}

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1 School of Civil
Engineering, Hebei University of Technology, Tianjin 300401,China;*

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2 Hebei Academy of
Building Research, Shijiazhuang 050021,China;*

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3 College of Civil
and Environmental Engineering, University of Science and Technology
Beijing,Beijing10083,China;*

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4 Hebei Institute of
Technology Co., Ltd.,Shijiazhuang,050021, China;*

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5 Hebei University of
Water Resources and Electric Engineering, Cangzhou, 061001, China*

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Abstract: **The preparation method of the new type
of foam concrete board was studied. The influence of different amount of fly ash
on the compressive strength, water absorption and thermal conductivity of foamed
concrete was studied. The experimental results show that under the same bulk
density, the 28 day compressive strength of foamed concrete increases with the
increase of the content of fly ash, and the compressive strength is the highest
when the amount of fly ash is 30%, and the strength of the case of the larger
design weight is smaller. And the water absorption rate is as the increase of
the amount of fly ash and the overall tends to decline, and in the design of
bulk density of 600 kg•m-3, water cement ratio is 0.42, the amount of fly ash is
30%, the water absorption rate of foam concrete. The thermal conductivity of
foamed concrete has no obvious effect on the thermal conductivity, which can
reduce the thermal conductivity of concrete, and the minimum thermal
conductivity is 0.55 w•( m•K)-1. the influence of different dosage of silica
fume, water absorption, thermal conductivity, different dosage and different
time on the degradation rate is discussed. The results show that, with the
increase of silica fume, the compressive strength of foamed concrete is
increased by 28 days, and the strength of foamed concrete can be improved by
10%. And the water absorption rate of the whole tends to decrease with the
increase of the amount of silica fume, and the water absorption rate of foamed
concrete is greatly reduced when the amount of silica fume is 10%. When mixed
with 10%, the thermal conductivity of concrete is reduced, the thermal
conductivity of the concrete is 0.62 w / (m·K). The degradation rate increased
with the increase of the amount of titanium dioxide, and the degradation rate
was 96% in 80 hours when the amount of nano-TiO2 was 0.9. In the specimen curing
time, the shorter the spraying time, the better the degradation rate.

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Keywords**:
fly ash; foam concrete; photocatalysis; nano-TiO2

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International Journal of
Ground
Sediment & Water**

ISSN: 2372-0743 (print) ISSN: 2373-2989 (on line)

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Journal Website:
http://ijgsw.comze.com/**

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