关键词: 稻草, 吸水率, 极限拉力, 极限延伸率, 加筋土, 防腐, 滨海盐渍土

Abstract:

Saline soil in inshore has some problems which were resulted from crystallizing and dissolving in salt and water absorption of soil. It must be treated in the stage of engineering construction. It has been suggested that rice straw can be anti-decayed with SH agent and used for reinforcing saline soil. Some tests were carried out in order to study the water content, maximum tension and maximum elongation of rice straw in condition of natural, soaked in water, soaked in SH agent and soaked in water after SH agent respectively. The results indicate that: (1) The water content of rice straw soaked in SH agent is obviously less than of natural rice straw, the biggest decreasing rate is 50%. (2) The maximum elongation and maximum tension of rice straw soaked in SH agent is more than those of natural rice straw, with the biggest increasing rate of 26% and 23%. (3) The maximum elongation and maximum tension of rice straw soaked in seawater after in SH agent is more than those soaked in seawater, with the biggest increasing rate of 12% and 11%. (4) Results of SEM and EDS test show that SH agent infiltrates into voids of rice straw and enhances the connection of fiber. In future, SH agent can be used to slow down the decay of rice straw and reinforcing saline soil with rice straw is feasible.

Key words: rice straw, water content, maximum tension, maximum elongation, reinforced soil, anti-decay, saline soil in inshore