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Optimum utilization of recycled aggregate and rice husk ash stabilized base material
Highlight The unconfined compressive strength and splitting strength of the mixture increased with adding recycled aggregate. The flexural tensile strength decreased with the increase of RHA content. After adding recycled aggregate, the dry shrinkage of the mixture was improved. It is suggested that the content of RHA should not be higher than 40%.
Abstract With the development of the economy and society, a huge amount of construction and biomass waste are produced every year. Improper disposal of waste will cause pollution to air, soil and groundwater. The sustainable recycling of construction and biomass waste has important benefits for environmental protection. In this paper, the influence of different rice husk ash (RHA) content on the road performance of cement stabilized base material with recycled aggregate was studied in terms of strength, frost resistance and shrinkage. The proportion of RHA replacing cement is 0%, 20%, 40%, 60%, 80% of cement quality, and construction waste recycled aggregate was used to replace 40% of natural aggregate. The main conclusions are as follows: the unconfined compressive strength and splitting strength with recycled aggregate decrease with the increase of RHA content, the compression resilience modulus and flexural tensile strength of the mixture increased obviously, but the frost resistance deteriorated. The dry shrinkage coefficient and temperature shrinkage coefficient of the mixture containing recycled aggregate increased linearly with the increase of RHA content. For the mixture mixed with recycled aggregate, it is recommended that the RHA content should not exceed 40%.
Optimum utilization of recycled aggregate and rice husk ash stabilized base material
Highlight The unconfined compressive strength and splitting strength of the mixture increased with adding recycled aggregate. The flexural tensile strength decreased with the increase of RHA content. After adding recycled aggregate, the dry shrinkage of the mixture was improved. It is suggested that the content of RHA should not be higher than 40%.
Abstract With the development of the economy and society, a huge amount of construction and biomass waste are produced every year. Improper disposal of waste will cause pollution to air, soil and groundwater. The sustainable recycling of construction and biomass waste has important benefits for environmental protection. In this paper, the influence of different rice husk ash (RHA) content on the road performance of cement stabilized base material with recycled aggregate was studied in terms of strength, frost resistance and shrinkage. The proportion of RHA replacing cement is 0%, 20%, 40%, 60%, 80% of cement quality, and construction waste recycled aggregate was used to replace 40% of natural aggregate. The main conclusions are as follows: the unconfined compressive strength and splitting strength with recycled aggregate decrease with the increase of RHA content, the compression resilience modulus and flexural tensile strength of the mixture increased obviously, but the frost resistance deteriorated. The dry shrinkage coefficient and temperature shrinkage coefficient of the mixture containing recycled aggregate increased linearly with the increase of RHA content. For the mixture mixed with recycled aggregate, it is recommended that the RHA content should not exceed 40%.
Optimum utilization of recycled aggregate and rice husk ash stabilized base material
Yan, Kezhen (author) / Lan, Haozhen (author) / Li, Qun (author) / Ge, Dongdong (author) / Li, Yiran (author)
2022-07-28
Article (Journal)
Electronic Resource
English
| Taylor & Francis Verlag | 2020
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