The present study explores the feasibility of microencapsulated phase change material (PCM) admixed high-volume fly ash (HVFA)–bottom ash (BA)–cement mixes for manufacture of masonry bricks. The cementitious mixes investigated in the present study are cement–HVFA–PCM pastes and cement–HVFA–PCM–sand (S)/ BA mixes, both with two different types and percentages of PCM. Experimental techniques based on packing density method are presented for determination of optimal mix proportions from workability and thermal performance viewpoint. Thermal, mechanical and durability-related properties of these mixes are analyzed through experimental investigations. The results of the study reveal that the developed mixes possess compressive strengths as high as 15 MPa, which is high enough for them to be used as masonry blocks. The PCM mixes are found to yield temperature reductions of 5°C over and above the control mixes, which is a significant improvement. PCM admixed HVFA–BA -cement mixes are found to be most congenial of all the mixes from thermal performance viewpoint due to their low thermal conductivities and high porosities. It is also found that PCM–HVFA–BA–cement mixes are lesser energy intensive, emit lesser carbon dioxide and are lighter in weight compared with conventional clay bricks.

本研究探讨了微囊化相变材料（PCM）掺入大体积粉煤灰（HVFA）-底灰（BA）-水泥混合物制造砖石砖的可行性。在本研究中研究的水泥混合料为水泥-HVFA-PCM浆料和水泥-HVFA-PCM-砂（S）/ BA混合料，均具有两种不同类型和百分比的PCM。提出了基于填充密度法的实验技术，从可加工性和热性能的角度确定最佳混合比。通过实验研究分析了这些混合物的热，机械和耐久性相关特性。研究结果表明，开发的混合料具有高达15 MPa的抗压强度，足以用作砌块。发现PCM混合物与对照混合物相比，温度降低了5°C，这是一个显着的改进。从热性能的角度来看，PCM混合的HVFA-BA-水泥混合物被认为是最合适的混合物，因为它们的低导热率和高孔隙率。还发现，与传统的粘土砖相比，PCM-HVFA-BA-水泥混合物的能源消耗更少，二氧化碳排放更少，重量更轻。