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本试验研究采用了两种不同的加速老化试验方法对抗碱纤维(Cem—FIL2)和剑麻纤维(其中包括经浸渍处理和未经浸渍处理的剑麻纤维)增强水泥砂浆试体进行了试验。研究了由于龄期变化造成的试件脆化。试验表明,玻璃纤维增强水泥随时间而变脆,剑麻纤维增强混凝土也随时间变化而变脆。但是,通过对纤维进行防护浸渍处理,可延缓这一脆化过程。当采用硅灰代替部分普通硅酸盐水泥以降低基材碱度时,这一脆化过程几乎停止发展。
In this study, two different accelerated weathering test methods were used to test the cement mortar reinforced body against alkali fiber (Cem-FIL2) and sisal fiber (including impregnated and unimpregnated sisal fiber). The embrittlement of specimens due to age changes was studied. Tests have shown that glass fiber reinforced cement becomes brittle over time, and sisal fiber reinforced concrete also becomes brittle over time. However, this process of embrittlement can be delayed by impregnating the fibers with protection. When using silica fume instead of part of the ordinary portland cement to reduce the alkalinity of the substrate, this embrittlement process almost stopped developing.