Yearly, approximately 750 million tons of rice husks is cultivated which generates about 160 million tons of rice husk that are eventually dumped on the environment as a waste to cover a large area of landfill and causes environmental pollution problems as well. The utilization of rice husk in concrete brings a great benefit in addressing both environmental and economic issues. During the combustion process, the lignin and cellulose content of rice husk is removed and a high amount of silica content is left at the end of the process. Ultrahigh-performance concrete (UHPC) which is one of the latest developments in the field of concrete technology contains about 900 kg/m³ up to 1000 kg/m³ of cement. However, cement production industry is responsible for about 7% of CO₂ emission generated with enormous effect on the environmental appearances apart from high cost. This study makes a comprehensive review on using rice husk ash as a supplement to cementitious materials on the performance of UHPC.

每年种植约7.5亿吨稻壳，产生约1.6亿吨稻壳，这些稻壳最终作为废物倾倒在环境中，覆盖了大面积的垃圾填埋场，也造成了环境污染问题。在混凝土中利用稻壳为解决环境和经济问题带来了巨大的好处。在燃烧过程中，稻壳中的木质素和纤维素含量被去除，并且在过程结束时残留了大量的二氧化硅。超高性能混凝土（UHPC）是混凝土技术领域的最新发展之一，其中包含约900 kg / m ³到1000 kg / m ³的水泥。然而，水泥生产行业约占CO _2的7％除了成本高外，对环境外观产生巨大影响的碳排放。这项研究对使用稻壳灰作为水泥材料对UHPC性能的补充作了全面综述。