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In order to take into account the specimensize in the spalling for castable during rapid drying, in this study, base on the Alumina castable binding by low-cement, ultra-low cement, silica sol, alphabond and MgO-SiO2-H2O respectively, we have studied the physical performance, examined the spalling resistance performance with diffenrence green body size and found that the influence of specimensize to the spalling performance have closely relative with the physical performance. First, when the castable have a denser and high strength body, the specimensize have a big influence to the spalling, instead, when the green body have a high porosity or low strength, there is no effect. Second, when the sample have a large size, castables combined with each binding agent are easier to spalling and the binding have no influence to spalling, rather, the samples combining with the hydrated are more likely to spalling.
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alvarohao

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)

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sltmac(½ð±Ò+1): 2011-12-24 11:02:51
sltmac(½ð±Ò+10, ·­ÒëEPI+1): 2011-12-26 13:02:48
To inspect the specimen size effect on the castable spalling during rapid drying, the spalling resistance performances and physical performances of green bodies in different sizes and with the castables based on the Alumina bonded with low-cement, ultra-low cement, silica sol, alphabond and MgO-SiO2-H2O, respectively, were studied. It was found that the specimen size effect on the castable spalling was closely relative with the low temperature physical performances. 1) With the green bodies which were denser and stronger, the specimen size effect on the spalling after being heated was bigger; while the initial green body had many pores and the strength was not very big or the initial green body was denser but the strength was ordinary, there was almost no effect. 2) When the specimen size was bigger, the castables with different bonding systems were all easier to be exploded, with the bonding way having not big effect on the castables explosion; while the specimen size was smaller, the hydrated castables were more likely to be exploded.
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2Â¥2011-12-24 10:47:26
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yb716

½ð³æ (ÕýʽдÊÖ)

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°®ÓëÓêÏÂ(½ð±Ò+1): 2011-12-24 19:56:50
sltmac(½ð±Ò+10): 2011-12-26 13:02:53
To inspect the effect of  specimen size on the castable spalling during rapid drying, we studied the physical performance and the spalling resistance performance of the Alumina castable binded with low-cement, ultra-low cement, silica sol, alphabond and MgO-SiO2-H2O, respectively. The results suggested that the influence of specimen size to the spalling performance was closely related to the cooling physical performance of Alumina castable . Generally,  to the castable with a denser and high strength body, the specimen size have a big influence to the spalling, while to the green body with a high porosity or low strength, the specimen size have no effect. when the sample have a larger size, castables combined with each binding agent are easier to spalling and the binding has no influence to spalling. By contrast, the smaller samples combining with the hydrated are more likely to be exploded
3Â¥2011-12-24 17:21:14
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