玻璃纤维粉煤灰水泥土的力学特性

Mechanical Behavior of Glass Fiber and Fly Ash Soil-cement

将工业生产的废料粉煤灰和价格相对低廉的玻璃纤维应用到水泥土中,运用正交试验方法,通过室内无侧限抗压强度试验,研究了玻璃纤维粉煤灰水泥土的无侧限抗压强度的影响因素及其发展规律。试验研究表明:在水泥土中掺入一定量的粉煤灰和玻璃纤维可以明显地提高水泥土的无侧限抗压强度。通过正交试验各个因素分析可得:龄期和水泥掺量对水泥土强度的影响较大,其次是粉煤灰,而玻璃纤维对强度的影响较小;同时对水泥、粉煤灰、玻璃纤维3个因素对玻璃纤维粉煤灰水泥土强度增长机理进行分析得到:水泥的水化是玻璃纤维粉煤灰水泥土强度增长的主要来源;粉煤灰的作用主要体现在填充效应、水化效应和形态效应3个方面;玻璃纤维的主要作用为固结加筋。

Industrial waste fly ash and relatively economical fiber glass were applied to soil-cement.By using orthogonal test method and through laboratory unconfined compressive strength test,the influencing factors and the development regularity of unconfined compressive strength of glass fiber and fly ash cement soil were discussed.The test result shows that with a certain amount of fly ash and glass fiber in soil-cement can significantly improve the unconfined compressive strength of soil-cement.Through the analysis of different factors in the orthogonal test,it shows that age and content of cement have significant impact on compressive strength of soil-cement,then is fly ash,and the impact of glass fiber is less.Through the analysis of the influence of cement,fly ash and glass fiber on the increment mechanism of strength of glass fiber fly ash cement-soil,it shows the hydration of cement mainly caused strength increment of glass fiber fly ash cement-soil,while the fly ash mainly acted for filling,hydration and morphology;and the main role of glass fiber was reinforced consolidation.