The cementation of sand into bio-brick materials through microbial induced calcium carbonate precipitation (MICP) is a novel technology with broad applications. The compression strength of the MICP treated bio-bricks was tested through brick compression tests. Additives including discrete randomly distributed fiber, coarse sand, and clay and multiple treatments were applied to reinforce the compression strength of bio-bricks. Results concluded that the increase of compression strength with treatment times for all bio-bricks seems to be intuitive – the more treatment times, the higher compression strength. The addition of synthetic and natural fibers can result in the increase of compression strength of the bio-bricks by 50–70%. The optimum clay content of strengthening brick compression strength is 2%. The contribution of void space from additional coarse sand on brick compression strength is insignificant. The water absorptions of bio-bricks ranged from 10.16% to 17.89%, which is comparable with that of traditional red bricks. Moreover, the overall results from FTIR, XRD, and SEM demonstrated the process of MICP and identified the formation of vaterite and calcite in the bio-bricks.

通过微生物诱导的碳酸钙沉淀（MICP）将沙子胶结成生物砖材料是一种具有广泛应用的新技术。通过砖压缩测试来测试经MICP处理的生物砖的压缩强度。添加剂包括离散的随机分布的纤维，粗砂和粘土以及多种处理方法，以增强生物砖的抗压强度。结果得出结论，所有生物砖的抗压强度随处理时间的增加似乎是直观的–处理时间越长，抗压强度越高。合成纤维和天然纤维的添加可以使生物砖的抗压强度提高50％至70％。增强砖抗压强度的最佳粘土含量为2％。来自额外粗砂的空隙空间对砖的抗压强度的影响微不足道。生物砖的吸水率在10.16％至17.89％之间，与传统的红砖相当。此外，FTIR，XRD和SEM的总体结果证明了MICP的过程，并确定了生物砖中球ate石和方解石的形成。