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首页> 外文会议>International Conference on Civil Engineering,Architecture and Building Materials >Mechanical Characteristics of Concrete Exposed to External Flexural Load, De-icing Salt and Freeze-thaw Cycles
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Mechanical Characteristics of Concrete Exposed to External Flexural Load, De-icing Salt and Freeze-thaw Cycles

机译：外部弯曲载荷的混凝土机械特性，脱冰盐和冻融循环

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摘要

This paper investigates mechanical characteristics of concrete exposed to external flexural load, de-icing salt and freeze-thaw cycles. Concrete specimens made with ordinary Portland cement or ordinary Portland cement incorporating fly ash with the replacement of 10% or 20%, or 0.7/10000 air-entraining agent and 20% fly ash, or ground blast furnace slag with the replacement of 15% or 30%, were made and exposed to flexural load, freeze-thaw and de-icing salt environment. Mechanical properties of concrete including compressive strength and flexural strength were measured. Phase composition of samples was determined by means of x-ray diffraction (XRD). Results indicate that increasing flexural stress ratios reduced compressive strength and flexural strength of concrete, and presented higher improvement of mineral admixtures in concrete strength. Incorporation of mineral admixtures and air-entraining agent decreased the loss of concrete strength. X-ray diffraction analysis showed the presence of abundant calcium chloroaluminate and ettringite in paste samples.
机译：本文研究了暴露于外部弯曲载荷，脱冰盐和冻融循环的混凝土的机械特性。用普通波特兰水泥或普通波特兰水泥制造的混凝土标本，掺入粉煤灰，替代10％或20％，或0.7 / 10000空气夹带剂和20％飞灰，或碎炉渣，更换15％或30％，进行，暴露于弯曲载荷，冻融和去冰盐环境。测量了混凝土的机械性能，包括压缩强度和抗弯强度。通过X射线衍射（XRD）测定样品的相组成。结果表明，增加弯曲应力比降低了混凝土的抗压强度和抗弯强度，并提高了混凝土强度的矿物混合物的提高。融合矿物混合物和空气夹带剂降低了混凝土强度的损失。 X射线衍射分析显示糊状样品中氯铝酸钙和Ettringite的存在。

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