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中文摘要：
根据戈壁的风沙流环境特点，采用气流挟沙喷射法，进行混凝土、砂浆和水泥石的冲蚀磨损试验，研究风沙流速度、冲蚀角度、冲蚀时间和沙流量对混凝土、砂浆和水泥石冲蚀磨损的影响。结果表明：混凝土、眇浆和水泥石的冲蚀率与风沙流速度近似呈线性关系，相比于混凝土和水泥石，砂浆的冲蚀率受风沙流速度的影响更大，拟合直线的斜率达2．25；混凝土、砂浆和水泥石的冲蚀率随冲蚀角度的增加而增加，冲蚀角为90。时冲蚀率最高，与脆性材料的冲蚀规律一致，其中砂浆的冲蚀率受冲蚀角度的影响更大；混凝土、砂浆和水泥石进入稳态冲蚀阶段所需的孕育期不同，在同样的试验条件下，混凝土和水泥石约需4min，砂浆约需5min；在帽同的冲蚀时间内，C30混凝土试样的冲蚀率随沙流量的增大先降低后增大。
英文摘要：
Based on the characteristics of gobi wind-sand flow environment, the erosion wear tests of con- crete, mortar and cement paste samples were carried out by sediment-air injection method to study the effects of wind-sand flow velocity, impact angle, impact time and erosive particle mass flow rate on the e- rosive wear rate of concrete, mortar and cement. Results show that the relationship between the erosion rates of concrete, mortar and cement paste and wind-sand flow velocity is approximately linear. Compared to concrete and cement paste, the erosion rate for mortar is relatively more affected by wind-sand flow ve- locity, and the slope of line fitting is 2.25. The erosion rates of concrete, mortar and cement paste samples increase with the increasing of impact angle. The erosion rates are the highest at the impact angle of 90~, which is in accordance with the erosion laws for brittle materials. Among which, the erosion rate of mortar is relatively more affected by impact angle. The incubation periods for concrete, mortar and cement paste required for attaining the steady erosion are different. Under the same experimental conditions, the con- crete and cement paste take about 4 min, and the mortar takes about 5 min. Within the same erosion time, the erosion rate for C30 concrete sample first decreases and then increases with the increase of sand mass flow rate.
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