The effect of foam porosity on absorption, chloride ingress and resistance to corrosion of embedded steel under a chloride environment was studied. Performance of mixes with water/cement (w/c) ratio of 0.5 and moderate and high foam contents of 20 and 50% were determined and compared with those of a base mix with the same proportions but without foam incorporation. A structural grade foam concrete with w/c ratio of 0.4 and foam content of 20% was also considered, together with a conventional concrete of equal strength level. The results show increased absorption of the paste fraction owing to foam incorporation as some of the foam porosity became saturated when submerged in water. Foam incorporation also resulted in increased chloride ingress and reduced durability against steel corrosion compared with the base mix with the same w/c ratio. However the structural grade foam concrete, owing to its lower w/c ratio, achieved similar levels of performance as the base mix and performed better than the conventional concrete of equal strength level.

中文翻译：

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泡沫含量对泡沫混凝土氯离子侵入和钢腐蚀的影响

研究了泡沫孔隙度对氯化物环境下埋藏钢的吸收，氯化物进入和耐腐蚀性的影响。测定了水/水泥（w / c）比为0.5，中高泡沫含量为20％和50％的混合物的性能，并将其与相同比例但未掺入泡沫的基础混合物的性能进行了比较。还考虑了w / c比为0.4，泡沫含量为20％的结构级泡沫混凝土，以及同等强度水平的常规混凝土。结果表明，由于部分泡沫孔隙度浸入水中后达到饱和状态，因此由于掺入泡沫而增加了对糊状部分的吸收。与具有相同w / c比的基础混合物相比，泡沫的掺入还导致氯化物的浸入增加，并降低了耐钢腐蚀的耐久性。