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http://dx.doi.org/10.4334/JKCI.2009.21.5.557

Experimental Study on the Properties of Solid Material Made by Autoclave Curing according to CaO/SiO2 Ratio and W/B  

Kang, Cheol (Dept. of Architecture, Kongju National University)
Kang, Ki-Woong (Korea National Housing Corporation)
Kim, Jin-Man (Dept. of Architecture, Kongju National University)
Publication Information
Journal of the Korea Concrete Institute / v.21, no.5, 2009 , pp. 557-563 More about this Journal
Abstract
This study is on the properties of inorganic porous calcium silicate material made from silica powder through the autoclaving curing, the results of this study should be utilized fundamental data for the development of noise reduction porous solid material using siliceous byproduct generated by various manufacture process. For the manufacture of autoclave curing specimen, various calcareous materials used and siliceous materials used silica powder. In this study, properties in density and compressive strength according to the change of W/B and C/S ratio, microscopy for the shape of pore, SEM and XRD for the examination of hydrate after autoclave curing are carried out respectively. The test results shown that the more slurry density decrease, the more W/B increase at the fresh state, this tendency shown similar to in hardened state. Among the specimens of C/S ratio, the compressive strength of C/S ratio of 0.85 gave the highest the compressive strength. In the results of XRD, tobermorite generated by autoclaving curing was created all of specimens regardless of C/S ratio. To ascertain pore structure, we compared with existing porous calcium silicate product(ALC, organic sound absorbing porous material). The results of microscope observation, pore structure of specimen of this study was similar to that of existing inorganic sound absorbing foam concrete. therefore, we could conformed a possibility of sound absorbing porous solid material on the basis of the results.
Keywords
autoclave; hydro-thermal synthetic reaction; C/S ratio; tobermorite; pore;
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