北方民居改性阻燃防腐强化稻草砖工艺探究

Study on Technique of Using Modification and Fire Retardant to Enhance Straw Brick in Northern China

[目的]研究稻草砖整体力学性能以及阻燃性能,确定综合性价比适合的工艺条件。[方法]以黑龙江稻草秸秆为原料,采用正交试验设计方法,研究北方民居改性阻燃防腐强化稻草砖工艺参数,包括硅酸钠水溶液、硅酸盐水泥、无水硫酸钙、工业硫酸铜添加量对该稻草砖的性能影响,并进行力学性质与阻燃性的测试。[结果]改性阻燃稻草砖最优化工艺条件为:硅酸钠水溶液添加量为3.6%,硅酸盐水泥添加量为16%,无水硫酸钙添加量为5.0%,硫酸铜添加量为4%,在实际操作工艺中,硫酸铜的添加量可以降低为2%,这样既可以降低成本,又可以降低对环境污染的压力。[结论]研究可为改性阻燃强化稻草砖这种新型墙体材料在我国北方农户中推广使用提供参考依据。

[Objective] To study the overall mechanical properties of rice straw brick and fire retardant properties,determine optimal technique conditions. [Method] With Heilongjiang rice straw as raw material,using orthogonal test desigm method,parameters of using modified fire retardant to enhance rice straw brick in northern China were studied,including effects of sodium silicate aqueous solution,portland cement,anhydrous calcium sulfate,industrial copper sulfate dosage on performance of straw brick,mechanical properties and fire retardant property was determined. [Result] The optimal conditions are： sodium silicate aqueous solution 3. 6%,portland cement 16%,anhydrous calcium sulfate 5. 0%,copper sulfate 4%. In practical operation,2% copper sulfate not only reduce cost,but also reduce the pressure of environment pollution. [Conclusion] The study can provide reference basis for extension of modified fire retardant enhancing straw brick in farmers of northern China.