Strength and Resistance of Alkali-Activated Slag Concrete to High Temperature
Strength and Resistance of Alkali-Activated Slag Concrete to High Temperature
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DOI：
10.4028/www.scientific.net/amm.193-194.431
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发表时间：
2012-08
期刊：
影响因子：
--
通讯作者：
M. Chi;R. Huang;W. Lu
中科院分区：
文献类型：
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作者：
M. Chi;R. Huang;W. Lu
研究了碱矿渣混凝土（AASC）的高温性能。以4%、5%和6%的氧化钠（Na 2 O）和模数比为0.8（SiO2/Na 2 O质量比）的液体硅酸钠（SiO2）为激发剂，对粒化高炉矿渣（GBFS）进行激发。将具有相同粘结剂含量和0.5的液体/粘结剂比的所有圆柱形试样分别在空气中、在饱和石灰水下和在相对湿度为80%RH和温度为60 °C的固化室中铸造和固化。试验结果表明，碱矿渣水泥的耐高温性能随温度的升高而降低。碱矿渣水泥的抗压强度和耐高温性能随Na 2 O掺量的增加而提高，在相对湿度为80%RH、温度为60 °C条件下养护的碱矿渣水泥具有较好的上级性能，其次是空气养护和饱和石灰水养护。碱矿渣水泥比普通水泥具有更高的抗压强度和上级的耐高温性能。
This study presents an investigation into high-temperature resistance of alkali-activated slag concrete (AASC). Sodium oxide (Na2O) concentrations of 4%, 5% and 6% of slag weight and liquid sodium silicate (SiO2) with modulus ratio of 0.8 ( mass ratio of SiO2 to Na2O ) were used as activators to activate granulated blast furnace slag (GBFS). All cylindrical specimens with the same binder content and liquid/binder ratio of 0.5 were cast and cured in the air, under the saturated limewater and in a curing room at relative humidity of 80% RH and temperature of 60 °C, respectively. Test results demonstrate that the high-temperature resistance of AASC decreased with an increase of temperature. The compressive strength and high-temperature resistance of AASC improved with an increase dosage of Na2O and AASC cured at relative humidity of 80% RH and temperature of 60 °C has the superior performance, followed the AASC by air curing and saturated limewater curing. The higher compressive strength and superior high-temperature resistance have been obtained in AASC than comparable OPC.