多因素耦合作用下玉米秸秆压浆处治材料试验研究

Experimental Study on Corn Straw Grouting Treatment Materials under Multi-factor Coupling Effect

摘要:

秸秆废弃物对环境及资源造成的浪费日益严峻，如何使其能够绿色发展，成为了工程行业研究的重中之重。选用玉米秸秆压浆处治材料为研究对象，以实验数据统计分析为基础，将养生龄期、冻融循环次数及玉米秸秆掺量作为控制因素，归纳总结了在多因素耦合作用下不同秸秆掺量的压浆材料力学及物理性能的变化规律。试验结果表明：掺入玉米秸秆后，压浆材料的各项性能均得到显著提升；在实际工程中，针对流量较大急需开放交通的道路，可增加秸秆的掺量以达到较好的强度要求，而对于有足够修补周期的道路，可优先选用提高材料的养生龄期；材料体积膨胀率的增速和养生龄期时间的增长呈反比；工程实践中，应将秸秆掺量控制在3%左右，不仅可以获得最大的工程效果，而且每年可有效利用秸秆约8 000万t。

Abstract:

The waste caused by straw waste to the environment and resources is increasingly severe. How to make it green has become a top priority in the engineering industry research. Selecting the corn straw grouting treatment materials as the research object, based on the statistical analysis of experimental data, and taking the curing age, freeze-thaw cycle times and corn straw dosage as control factors, the change law of mechanical and physical properties of grouting materials with different straw dosages under the coupling effect of multiple factors is summarized. The experimental results indicate that after adding corn straw, various properties of the grouting material are significantly improved. In practical engineering, for the roads with high traffic volume and urgent need for open traffic, the addition of straw dosage can achieve the better strength requirements. For the roads with sufficient repair cycles, the priority can be given to improve the curing age of material. The growth rate of material volume expansion is inversely proportional to the growth of the curing age. In engineering practice, the amount of straw added should be controlled at around 3%, which can not only achieve the maximum engineering effect, but also effectively utilize about 80 million tons of straw annually.