In-situ foamed geo polymers have been produced from fly ash/slag blend, surfactant, hydrogen peroxide (H₂O₂) and sodium silico fluoride in an alkaline medium and evaluated their physico-mechanical, micro structural and fire characteristics as a function of foaming agent. Isothermal calorimetric response has been indicated that the rate of geo polymerization for the foam slurry was ~25% more than its un-foam slurry. An increase of H₂O₂ from 0.5 to 3 wt% has reduced the compressive strength of foamed geo polymers from 7.2 to 2.45 MPa. As observed in field emission scanning electron microscope (FESEM), the pores have been spherical ranging in sizes between 42 µm and 585 µm with varying H₂O₂ dosages. The relationship between the compressive strength and porosity has been in agreement with the exponential model. The thermal conductivity of foamed geo polymers has ~36% less than the commercial cellular concrete at a density of 1000 Kg/m³. Flammability test has shown that the samples belong to D class as per ISO 11925-2 and also exhibiting no support to the fire growth when tested as per BS 476-6. During immersion in water, the alkali leaching (pH 11-12.2) and also the fractional release of Na (22 ppm) and Si (18 ppm) under TCLP test have been observed. Based on the results, the foamed geo polymer blocks have been produced with satisfactory properties as per the requirements of commercial specification of cellular concrete blocks.

中文翻译：

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粉煤灰/矿渣基泡沫土聚合物混凝土砌块的物理机械可燃性和浸出特性

在碱性介质中由粉煤灰/矿渣共混物，表面活性剂，过氧化氢（H ₂ O ₂）和氟化硅钠制得原位泡沫地质聚合物，并评估了它们的物理力学，微观结构和着火特性，取决于发泡剂。等温量热响应表明，泡沫浆液的地质聚合速率比非泡沫浆液高约25％。H ₂ O ₂从0.5 wt％增加到3 wt％已使泡沫地质聚合物的抗压强度从7.2 MPa降低到2.45 MPa。如在场发射扫描电子显微镜（FESEM）中观察到的，随着H ₂ O的变化，这些孔呈球形，尺寸在42 µm至585 µm之间。_2剂。抗压强度与孔隙率之间的关系与指数模型一致。在密度为1000 Kg / m ^{3的情况下，}泡沫土聚合物的导热系数比商品多孔混凝土低约36％。可燃性测试表明，这些样品属于ISO 11925-2的D类，并且当按照BS 476-6进行测试时，也没有显示出对火焰增长的支持。在浸入水中的过程中，观察到了碱浸出（pH 11-12.2）以及在TCLP测试中Na（22 ppm）和Si（18 ppm）的部分释放。根据结果​​，根据蜂窝混凝土砌块的商业规格要求，已生产出具有令人满意性能的泡沫土工聚合物砌块。