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The effects of cement-based and cement-ash-based mortar slabs on indoor air quality

机译：水泥基和水泥灰基砂浆板对室内空气质量的影响

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The effects of emissions from cement-based and cement-ash-based mortar slabs were studied. In the latter, 30% of the cement content had been replaced by sewage sludge ash. They were tested singly and together with either carpet or linoleum. The air exhausted from the chambers was assessed by means of odour intensity and chemical characterization of emissions. Odour intensity increased with the increased exposed area of the slabs. It did not differ significantly between cement-based or cement-ash-based mortar and neither did the chemical composition of the exhaust air. A significant sink effect was observed when linoleum was added to any of the two slabs examined. The sink effect increased as the exposed area of the slabs was increased. The odour intensity of the mixture of the slab and linoleum was lower than the intensity of odour produced by any of the two materials when tested singly. A plausible explanation for this effect was that the mortar slabs adsorbed the organic acids that were emitted at a high rate from linoleum, mortar being strong base. The same sink effect was also observed when the mortar slabs were exposed together with carpet but it was much smaller because the carpet emitted smaller quantities of acids. The total concentration of organic compounds measured was not appreciably different when the slabs were tested alone or together with linoleum or carpet. Considerable differences in the concentration of organic compounds were however observed when the total concentration of each functional group was calculated and compared.
机译：研究了水泥基和水泥灰基砂浆板排放的影响。在后者中，水泥含量的30％已被污水污泥灰代替。它们分别与地毯或油毡一起进行了测试。通过气味强度和排放物的化学特性评估从腔室排出的空气。气味强度随平板暴露面积的增加而增加。水泥基或水泥灰基砂浆之间无显着差异，废气的化学组成也无明显差异。当将油毡添加到所检查的两个平板中的任何一个上时，观察到显着的下沉效果。随着板的暴露面积增加，下沉效应增加。当单独测试时，平板和油毡的混合物的气味强度低于由两种材料中的任何一种产生的气味强度。对此效果的合理解释是，灰浆板吸附了从油毡以高速率排放的有机酸，而灰浆是强碱。当砂浆板与地毯一起暴露时，也观察到了相同的下沉效果，但由于地毯释放出较少量的酸，所以它要小得多。当平板单独或与油毡或地毯一起测试时，测得的有机化合物的总浓度没有明显差异。然而，当计算并比较每个官能团的总浓度时，观察到有机化合物浓度的显着差异。

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