干旱区生态环境知识资源中心(Arid): Recycled aggregate from wet mix concrete

Arid

	Recycled aggregate from wet mix concrete
	Law, D. W.; Gunasekara, C.; Setunge, S.; Hogan, M.; Thomas, D.
通讯作者	Law, DW (corresponding author), RMIT Univ, Civil & Infrastruct Engn, Melbourne, Vic, Australia.
会议名称	2nd International Conference in Sustainable Buildings & Structures (ICSBS)
会议日期	OCT 25-27, 2019
会议地点	Xian Jiaotong Liverpool Univ, Suzhou, PEOPLES R CHINA
英文摘要	Quarry aggregate reserves are depleting fast, particularly in some desert regions of the world. Worldwide Quarry aggregate production is about 4.5 billion tonnes, and Australia alone consumes about 130 million tonnes of aggregates annually. The process energy usage and greenhouse gas emissions from Quarry aggregate is around 7.4 to 8.0 kg CO2-e per tonne. Aggregate demand is also increasing with the expansion of construction. In contrast, the annual production of premix concrete in Australia is about 30 million cubic meters, and 3.5 % of concrete delivered to site remains unused and ends up in the landfills or crushing plants. Thus, manufacturing coarse aggregates using waste concrete is a sustainable approach in terms of environmental and economic aspects. This paper presents the mechanical performance results of concrete produce using a novel manufactured coarse aggregate recycled directly from premix concrete. A series of mixes of were produced using this manufactured coarse aggregate with the replacement by weight of quarry aggregate by 25%, 50%, 75% and 100%. The mixes investigated were 100% Ordinary Portland cement and 25% replacement with Fly Ash for a 25 MPa and a 32 MPa concrete. All mixes were tested at 7 and 28 days for the compressive strength, and then compared with the concrete produced with quarry aggregate. Test results demonstrated that concrete produced with the recycled aggregate achieved a mean 28 day compressive strength equivalent to that of natural granite aggregate for the 25 MPa mix and slightly lower (1-3 MPa) for the 32 MPa mix. No effect on compressive strength was observed based on the level of replacement of recycled aggregate added.
来源出版物	SUSTAINABLE BUILDINGS AND STRUCTURES: BUILDING A SUSTAINABLE TOMORROW
出版年	2020
页码	28-31
ISBN	978-1-003-00071-6; 978-0-367-43019-1
出版者	CRC PRESS-BALKEMA
类型	Proceedings Paper
语种	英语
收录类别	CPCI-S
WOS记录号	WOS:000651804300015
WOS类目	Construction & Building Technology ; Green & Sustainable Science & Technology ; Engineering, Civil
WOS研究方向	Construction & Building Technology ; Science & Technology - Other Topics ; Engineering
资源类型	会议论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353183
作者单位	[Law, D. W.; Gunasekara, C.; Setunge, S.] RMIT Univ, Civil & Infrastruct Engn, Melbourne, Vic, Australia; [Hogan, M.; Thomas, D.] Cycrete Pty Ltd, Unit Birubi Chambers 9, Hawker, Australia
推荐引用方式 GB/T 7714	Law, D. W.,Gunasekara, C.,Setunge, S.,et al. Recycled aggregate from wet mix concrete[C]:CRC PRESS-BALKEMA,2020:28-31.