泡沫混凝土复合保温板料浆凝结时间的研究

Research on setting time of foam concrete insulation plate slurry

运用贯入阻力法对泡沫混凝土复合保温板料浆进行了凝结时间的测定。结果表明,采用贯入深度为10 cm,贯入阻力为10 k Pa时的凝结时间作为料浆的初凝时间比较合适。不同粉煤灰掺量下,随粉煤灰掺量的增大,初凝时间变长。运用回归方法得出贯入阻力和时间的非线性回归方程:fc=a1+a2t+a3t2。料浆水化温度研究显示,水化集中放热区间在82 min到7 h之间。生产检测显示:当初凝时间为150 min以内时,则不宜出现塌模、下沉现象。当初凝时间在200 min以上时,则经常出现塌模、下沉现象。

The text mensurated the setting time of foam concrete with the penetration resistance method.The result showes it is suitable as initial setting time,whan the penetration depth is 10 cm and the setting time of penetration resistance is 10 kPa.with the increase of the amount of fly ash, the initial setting time become long. it is by using the nonlinear regression equation to analysis penetration resist- ante and time.Heat of hydration generally release in the range of 82 min to 7 h by mensurating slurry temperature. Production test shows：when the setting time is 150 min or less,it should not appear collapse and sinking.Initial setting time is above 200 min,the phenomenon of collapse and sinking is often occuring.