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1篇 您的检索式：作者名="Alex Hanmore"

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		题名	作者	年代	出处	被引量
	1	NRG COSIA Carbon XPRIZE: carbon-dioxide mineralization in recycled concrete wash water显示文摘Wash water is generated as a waste stream from ready-mixed-concrete production.Reuse of the water as mixture water is limited,in practice,by the negative material performance impacts associated with the water chemistry and properties;the effects are intensified with increasing content of suspended solids and age.However,this waste material can be used as a beneficial additive to concrete by profiting from the cementitious properties of the suspended solids,if variability can be reduced.A method of stabilizing this material is through CO_(2) treatment.The added CO_(2) is mineralized through a reaction with the calcium from the cement particles.This provides a calcium-carbonate coating that prevents further cement hydration,making the material predictable.This has been shown to alleviate concerns with set acceleration and inconsistencies in compressive strength.A method of CO_(2) treatment was tested as part of the NRG COSIA Carbon XPRIZE at a site in Calgary,Alberta.The slurry for the treatment was provided by a local concrete plant and had a specific gravity of 1.15.The simulated wash water was treated in 1000-L quantities with each treatment mineralizing an average of 40 kg of CO_(2).The system ran for 1600 hours of operation over 127 treatment cycles and converted 14.5 tonnes of CO_(2) at an average mineralization efficiency of 80%.The treated slurry was used as an additive in>300 batches of concrete where the concrete met the necessary requirements for fresh properties and setting time,while achieving a strength benefit.Replacement of 5%and 10%of batch water with treated slurry(9.4 and 18.8 kg slurry/m^(3) concrete)showed a strength benefit of 3%and 6%compared to a reference.The technology was selected as the winner of the NRG COSIA Carbon XPRIZE(Track B:Natural Gas)in April 2021.	Sean Monkman Travis Janke Alex Hanmore	2021	Clean Energy2021，5，4：	1

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