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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Deriving Value from Challenging Waste Streams: Recycling and Sustainability Joint Session
Presentation Title Utilization CFA-derived Tobermorite Fiber as Crystallization Revulsive in Autoclaved Concrete Block Production
Author(s) Pengxu Cao, Jun Luo, Guanghui Li, Yijia Dong, Mingjun Rao, Zhiwei Peng
On-Site Speaker (Planned) Pengxu Cao
Abstract Scope Coal fly ash (CFA), as a by-product generated from coal fired power stations, is widely used for autoclaved concrete block production. It has been found that the generation of tobermorite is great benefit to the block strength during autoclaving. In this study, the tobermorite fibers synthesized from CFA and lime via the hydrothermal process are used as the revulsive to promote the mechanic strength of the concrete blocks. The results show that tobermorite fibers with 0.01-0.5 μm in diameter and 1-3 μm in length are obtained at 200 oC for 0.2 h. With the addition of prepared tobermorite fibers increases from 0 wt.% to 2.0 wt.%, the compression strength of concrete block increases from 24.6 MPa to 40.5 MPa, and the compression strength of aerated concrete block produced under the optimized conditions can reach above 7.5 MPa.
Proceedings Inclusion? Planned:

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A New Technology for Cleaning Machining Metal Chips
A Sustainable Methodology for Recycling Electric Arc Furnace Dust
An Eco-friendly Extraction Method for Recovery of Valuable Metals from Spent Ni-W/Al2O3-SiO2 Catalysts
An Electrochemical Procedure for Copper Removal from Regenerated Pickling Solutions of Steel Plants
B-10: Evaluation of the Occurrence of Fouling and Scaling on the Membrane HDX 200 for the Treatment of the Effluent of Brass Electrodeposition with EDTA as Complexing Agent
B-11: High Temperature Crystallization Kinetics of MgSO4.H2O
B-12: Incorporation of Rubber Waste Powder from Scrap Tires into Heavy Clay Ceramics
B-13: Method of Utilization of Waste Electronic Technique with the Assistance of Combined Electrochemical Reactions
B-14: Preparation of Glass-ceramic from Titanium-bearing Blast Furnace Slag by “Petrurgic” Method
B-15: Production of Antimicrobial Bioplastics from Agricultural Wastes for Medical Packaging
B-16: Recovery of Copper from Nickel Laterite Leach Waste by Chemical Reduction Using Sodium Dithionite
B-17: Recovery of Nickel and Cobalt from a Waste Zone of Nickel Laterite Ore Using a Mixture of Extractants in Solvent Extraction Technique
B-18: Rural Water Pollution and its Strategies in China
B-19: Study on the Passivation Effect of Cr6+ in the Waste Water of the Blood Meal
B-20: White Ordinary Portland Cement Paste with Iron Oxide Powders Containing Arsenic Contents
B-7: Bacterial Degradation of Free Cyanide in Alkaline Medium Using Bacillus Licheniformis Strain
B-8: Determination of Limiting Current Density of a Solution with Copper, Zinc and EDTA from the Effluent of Brass Electrodeposition
B-9: Effect of the PH on the Recovery of Al3+, Co2+, Cr3+, Cu2+, Fe3+, Mg2+, Mn2+, Ni2+ and Zn2+ by Purolite S950
Behavior of Co, Ni and Precious Metals in Copper Converting Process: Experimental Study
Comminution and Separation of Photovoltaic Panel Materials for Recycling
Complete Recycling of Waste Diamond Cutting Tools by an Electrochemical Method
Different Methods for the Characterization of Ash Compositions in Co-firing Boilers
Effect of Ferrosilicon on Reduction of Cr2O3 in Steelmaking Slags
Engineering, Scientific, and Policy Inputs for Developing a Levelized Cost of Energy Storage Model
Investigation into the Recovery of Valuable Metals from Waste Mobile Phone Printed Circuit Boards (PCBs) – a Feasibility Study
Kinetic Investigations on the Recovery of Residues from the Stainless Steel Industry
Mechanism of Residual Iron Oxides in Preparation of Tailings Glass Ceramics
Mechanisms for Advancing Recovery of Resources from Small Sized End-of-life (EoL) Equipment
Novel Technologies for Technospheric and Urban Mining of Rare Earth Elements from Phosphogypsum, Red Mud, Hybrid Car Batteries, and Wind Turbine Magnets
Rapid Removal of Pb(II) from Acid Wastewater Using Vanadium Titanium-bearing Magnetite Particles Coated by Humic Acid (VTM-HA) Magnetic Particles
Recovery of Copper from Industrial Waste Water by Electrowinning
Recovery of Gallium and Arsenic from Gallium Arsenide Semiconductor Scraps
Recovery of REE from the Ferrous Fraction of Processed WEEE
Recycling of EAF Dust through Source Separation
Study on the Technology of Synthesizing MgAl2O4 Spinel Refractory Material from Waste Chromium Slag of a Certain Chrome Plant in China
Tannic Acid as a Flame Retardant - Deriving Value from Leather Tanning Waste
Thermal Separation and Leaching of Valuable Elements from Waste-derived Ashes
Towards Commercialization of Indium Recovery from Waste Liquid Crystal Display Screens
Upgrading the Copper Value in a Waste Copper Smelter Dust Using the Falcon Concentrator
Urban Mining for a Circular Economy: Activities at SINTEF
Utilization CFA-derived Tobermorite Fiber as Crystallization Revulsive in Autoclaved Concrete Block Production

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