A cost-efficient UHPC incorporated with coarse aggregates and macro fibres recycled from waste GFRP

Yuan，Hong1,2,3; Lin，Wei Lin1; You，Xue Min1; Fu，Bing1,2; Zou，Qi Qi4; Xiang，Yu5

2023-08-15

10.1016/j.jobe.2023.106786

Journal of Building Engineering   影响因子和分区

2352-7102

High production cost is a key impediment to the broader applications of UHPC materials. In the present study, a concept has been therefore proposed on jointly incorporating coarse aggregates and macro fibres recycled from waste GFRP in the UHPC system to produce a cost-efficient UHPC. The coarse aggregates were respectively incorporated into UHPC using the modified Andreasen and Andreasen model (MAAM) leading to the cement added in per m UHPC being as low as 668 kg. Compression and flexural tests were first carried out to examine the effects of incorporating both coarse aggregates and macro fibres on the properties of such a UHPC. The tensile stress-strain curves were then obtained from the data results of bending tests through a twice inverse analysis. A cost analysis was performed as well to quantitatively compare the production costs of different UHPCs, justifying the proposed concept. The test results and discussion revealed that the UHPC incorporated coarse aggregates have a compressive strength of about 150 MPa, and the presence of macro fibres of 6% in volume results in about 20% decrease in the compressive strength of UHPC, but significantly enhances the flexural properties of UHPC, including peak strength, residual strength, and toughness. The production cost of the UHPC mixture has been lowered to about 1700 CNY/m³ by jointly incorporating coarse aggregates and macro fibres. The maximum value of the efficiency index (E) is achieved when utilizing aggregate with a maximum particle size of 9.5 mm and 6% macro fibre.

Coarse aggregate GFRP waste Production cost Recycling Ultra-high-performance concrete

SCI ; EI

英语

其他

National Natural Science Foundation of China[51978176];National Natural Science Foundation of China[52178212];

Construction & Building Technology ; Engineering

Construction & Building Technology ; Engineering, Civil

WOS:001054593000001

ELSEVIER

20232014090953

Bending tests ; Concrete aggregates ; Cost benefit analysis ; Fibers ; High performance concrete ; Particle size ; Particle size analysis ; Recycling ; Stress-strain curves

Concrete:412 ; Strength of Building Materials; Test Equipment and Methods:422 ; Industrial Wastes:452.3 ; Cost and Value Engineering; Industrial Economics:911 ; Management:912.2 ; Materials Science:951

2-s2.0-85159175024

Scopus

1.School of Mechanics and Construction Engineering,Jinan University,Guangzhou,510632,China
2.MOE Key Lab of Disaster Forecast and Control in Engineering,Jinan University,Guangzhou,510632,China
3.School of Architectural Engineering,Guangzhou Institute of Science and Technology,Guangzhou,510540,China
4.Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,518000,China
5.Department of Civil and Environmental Engineering,The Hong Kong Polytechnic University,Hong Kong

Yuan，Hong,Lin，Wei Lin,You，Xue Min,et al. A cost-efficient UHPC incorporated with coarse aggregates and macro fibres recycled from waste GFRP[J]. Journal of Building Engineering,2023,73.

Yuan，Hong,Lin，Wei Lin,You，Xue Min,Fu，Bing,Zou，Qi Qi,&Xiang，Yu.(2023).A cost-efficient UHPC incorporated with coarse aggregates and macro fibres recycled from waste GFRP.Journal of Building Engineering,73.

Yuan，Hong,et al."A cost-efficient UHPC incorporated with coarse aggregates and macro fibres recycled from waste GFRP".Journal of Building Engineering 73(2023).