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An innovative disc shell-making method for preparing porous eco-concrete with cold-bonded lightweight aggregates
Renjie Niu1, Junjie Hu1, Junyao Liu1
1Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen, 518060, China.
Abstract:
Porous eco-concrete (PEC) can achieve safety protection and ecological protection. This study utilized cold-bonded lightweight aggregates (CBLAs) as coarse aggregates and improved the PEC preparation process via the disc shell-making method. The compressive strength, void ratio, pH value, sand permeability, and plant growth of PECs were studied. The use of CBLAs can reduce the amount of cement used, reduce the total amount of Ca(OH)2, and improve the living environment of plants. The new technology of using a disc to prepare PECs helps wrap the cement slurry evenly around CBLAs, reducing the problem of bottom slurry sedimentation and slurry blockage in fresh concrete and ensuring space for plant root growth. The germination rate of plants cultivated with CBLAs is more than twice that of plants cultivated with natural aggregates. In summary, this study provides a new avenue for the widespread application of CBLAs and AAPEC.
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