Pore Structure Characteristics of Baking-Free Slag-Sludge Bricks and Its Correlations to Mechanical Properties

Published on Jan 1, 2021in Journal of Renewable Materials1.67
· DOI :10.32604/JRM.2021.015140
#1Robert Schulte Holthausen (RWTH Aachen University)H-Index: 4
#2Michael Raupach (RWTH Aachen University)H-Index: 22
In this study, single-sided proton nuclear magnetic resonance (1H NMR) was used to quantify the porosity of the concrete cover. Laboratory concrete samples were prepared with different formwork sur...
#1Nastassia Sithole (UJ: University of Johannesburg)H-Index: 3
#2Tebogo Mashifana (UJ: University of Johannesburg)H-Index: 4
Abstract This article investigated the feasibility to synthesise geopolymer bricks from Granulated Blast Furnace Slag (GBFS) using alkaline activators without addition of sodium silicate or silica reactive source. Sodium hydroxide (NaOH) is a typical alkaline solution used in geopolymerisation compared to KOH with addition of silicate solution used as a catalyst to enhance the dissolution process. However, a comparative study between the two alkaline activators in the absence of silica solution ...
#1Huawei Liu (Xi'an University of Architecture and Technology)H-Index: 4
#2Chao Liu (Xi'an University of Architecture and Technology)H-Index: 6
Last. Chao Zhu (Xi'an University of Architecture and Technology)H-Index: 7
view all 4 authors...
Abstract In this study, based on the porous interface of recycled aggregates (RA), the effects of chloride ion (Cl−) ingress by drying-wetting cycles on the pore structure of recycled aggregate concrete (RAC) with a full replacement ratio under different temperatures conditions were investigated. Changes in the pore structure of the old and new mortars were determined by mercury intrusion testing. The surface morphology and morphological characteristics of the reaction products in the pores were...
#1Wentao Zhou (SEU: Southeast University)H-Index: 2
#2Fengming Yang (SEU: Southeast University)H-Index: 2
Last. Zengmei Wang (SEU: Southeast University)H-Index: 18
view all 9 authors...
Abstract As the inevitable by-product of sewage treatment, millions of tons of municipal sewage sludge (MSS) are increasingly stockpiled every year around the globe, creating enormous pressure on the environment and society. The preparation of porous insulation bricks based on MSS is put forward to realize environment protection and waste reclamation. However, the excessive amount of MSS will lead to the deterioration of strength and durability in the bricks. In this paper, the pore structure an...
#1Charitha Seneviratne (RMIT: RMIT University)H-Index: 2
#2Chamila Gunasekara (RMIT: RMIT University)H-Index: 12
Last. Dilan Robert (RMIT: RMIT University)H-Index: 14
view all 5 authors...
The long-term impact on creep, drying shrinkage, and permeation characteristics of an innovative concrete produced with manufactured geopolymer coarse aggregate (GPA) has been investigated and compared with quarried Basalt aggregate concrete. Microstructure and pore-structure development up to 1 year were examined through scanning electron microscopy, nanoindentation, and X-ray computed tomography. Compressive strength and elastic modulus of GPA concrete varied from 34.6 to 50.8 and 18.5 to 20.5...
#1Daman K. Panesar (U of T: University of Toronto)H-Index: 23
#2Runxiao Zhang (U of T: University of Toronto)H-Index: 10
Abstract Using supplementary cementing materials (SCMs) as cement replacing materials is common practice in the construction industry to achieve more durable concrete and less CO2 emissions associated with producing concrete materials. The use of finely ground limestone filler (LF) as a cement replacing material is also becoming a widely considered option, partly because of the limited availability of SCMs in some geographic regions. This study provides a comprehensive review based on published ...
#1Nur Ain Jaya (UniMAP: Universiti Malaysia Perlis)H-Index: 7
#2Liew Yun-Ming (UniMAP: Universiti Malaysia Perlis)H-Index: 5
Last. Kamarudin Hussin (UniMAP: Universiti Malaysia Perlis)H-Index: 19
view all 5 authors...
Abstract This paper investigates the effect of mixing parameters (that are, alkali concentration, AA ratio, and MK/AA ratio) on the thermal conductivity of metakaolin geopolymers. The combination effect of foaming agent (H2O2) and surfactant (Tween 80) on the physical properties, compressive strength, and pore characteristic was also elucidated. Results showed that metakaolin geopolymer with maximum compressive strength of 33 MPa, bulk density of 1680 kg/m3, porosity of 18% and thermal conductiv...
#1Yuzhou Peng (Tianjin University of Science and Technology)H-Index: 2
#2Xiao Peng (Tianjin University of Science and Technology)H-Index: 3
Last. Yan Wu (Tianjin University of Science and Technology)H-Index: 3
view all 7 authors...
Abstract The massive accumulation of dredged sediments and the heavy consumption of gravel are urgent environmental problems in human productive activities. To overcome these issues, a new technology of baking-free bricks of non-sintered wrap-shell lightweight aggregates (WSLAs) from dredged sediments was studied. The baking-free technology was adopted in craft to prepare the WSLAs whose macro and micro structures were used for characterization, and then WSLAs were used in replacing crush stone ...
#1Osman Hulusi Oren (Şırnak University)H-Index: 4
#2Aliakbar Gholampour (University of Melbourne)H-Index: 21
Last. Togay Ozbakkaloglu (Texas State University)H-Index: 56
view all 4 authors...
Abstract In recent years, industrial by-products have been considered as a promising waste-based material in the production of concrete for development of an eco-friendly construction material. An experimental study on the properties of foam concretes, made with a protein-based foam agent, containing fly ash (FA) as binder and granulated blast furnace slag (GBS) as fine aggregate is presented in this paper. A total of nine batches of foam concretes were manufactured and tests were performed to e...
#1Hoang-Anh NguyenH-Index: 7
#2Ta-Peng Chang (NTUST: National Taiwan University of Science and Technology)H-Index: 18
Last. Anne Thymotie (NTUST: National Taiwan University of Science and Technology)H-Index: 2
view all 3 authors...
Abstract The current study aims at exploring existing problems of a supplementary cementitious material with slag cement mixture, and distinguishing benefits of using different commercial chemical agents to improve the performance of the binder. Experimental results showed that although slag replacement led to fresh pastes with improved workability and lowered hydration heat liberation, it generally caused impacts of delayed setting times and reduced early compressive strengths of the binder. Th...
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