Results 241 to 250 of about 4,357,340 (293)

Alkali-activation of aggregate fines from construction and demolition waste: Valorisation in view of road pavement subbase applications

Journal of Cleaner Production, 2019
This study investigates the potential of fine particles of recycled construction and demolition waste (CDW) aggregate to undergo alkali-activation when mixed with an appropriate alkaline solution.
M. Bassani, L. Tefa, Bonaventura Coppola, P. Palmero   +3 more
semanticscholar   +1 more source

Alkali-activation of recycled construction and demolition waste aggregate with no added binder

Construction and Building Materials, 2019
The alkaline-activation of aluminosilicate compounds present in fine particles of unselected construction and demolition waste (UCDW) aggregates is investigated here.
M. Bassani, L. Tefa, A. Russo, P. Palmero   +3 more
semanticscholar   +1 more source

Effect of Alkali-Activators on the Strength Development and Drying Shrinkage of Alkali-Activated Binder

Advanced Materials Research, 2012
The purpose of this study is to investigate the effect of various contents and modulus ratios of alkali activators on strength development and drying shrinkage of alkali-activated slag pastes. Experimental results show that the alkali-modulus ratio is the key factor influencing pH value and drying shrinkage.
Mao Chieh Chi, Jiang Jhy Chang, Ran Huang, Zai Long Weng   +3 more
openaire   +1 more source

Decalcification resistance of alkali-activated slag

Journal of Hazardous Materials, 2012
This paper analyses the effects of decalcification in concentrated 6M NH(4)NO(3) solution on mechanical and microstructural properties of alkali-activated slag (AAS). Portland-slag cement (CEM II/A-S 42.5 N) was used as a benchmark material. Decalcification process led to a decrease in strength, both in AAS and in CEM II, and this effect was more ...
Miroslav M, Komljenović, Zvezdana, Baščarević, Nataša, Marjanović, Violeta, Nikolić   +3 more
openaire   +2 more sources

Fracture properties of alkali activated mortars

Proceedings of the 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures, 2019
In this paper, three different coal fly ash-based alkali activated mortars are studied. The three different mortars are obtained using the same binding system but different types (i.e. silica sand or expanded perlite) and sizes of aggregates. Small-scale beams are constructed together with additional specimens for material characterization.
GIULIA BAIETTI, LORENZA CARABBA, GIOVANNI QUARTARONE, CHRISTIAN CARLONI, STEFANIA MANZI, MARIA CHIARA BIGNOZZI   +5 more
openaire   +1 more source

Immobilisation of iodide in alkali-activated materials

Chemosphere
At the Fukushima Daiichi Nuclear Power Station (FDNPS), continuous water circulation cools fuel debris, leading to the presence of radionuclides such as Sr-30, Cs-137, and I-129 in the cooling water. These radionuclides are adsorbed and co-precipitated by various materials.
Raudhatul Islam Chaerun, Manami Ishimura, Pramesti Prihutami, Xiaobo Niu, Yusuke Ohya, Kazuma Kuroda, Kanako Toda, Ryosuke Kikuchi, Tsubasa Otake, John L. Provis, Yogarajah Elakneswaran, Tsutomu Sato   +11 more
openaire   +2 more sources

Properties of alkali-activated clinoptilolite

Cement and Concrete Research, 2000
Abstract Materials made by hydrating the natural zeolite clinoptilolite with calcium hydroxide (Ca(OH)2) have been characterised and compared to other alkali-activated waste-derived and naturally occurring pozzolana. Compressive strength is dependent on the Ca(OH)2 content, clinoptilolite particle size, and curing conditions. Optimising each of these
Elena Alcantara Ortega, Chris Cheeseman, Jonathan Knight, Maria Loizidou   +3 more
openaire   +1 more source

Application of nanomaterials in alkali-activated materials

2019
This chapter provides a comprehensive overview on the application of nanomaterials in alkali-activated materials. During the last decades alkali-activated materials have gained great attention as a promising alternative to Portland cement, which is associated with the great primary resources and energy consumption, and greenhouse gas emission.
openaire   +1 more source

Mine tailings as a raw material in alkali activation: A review

International Journal of Minerals, Metallurgy, and Materials, 2020
Jenni Kiventerä, P. Perumal, J. Yliniemi, M. Illikainen   +3 more
semanticscholar   +1 more source

Alkali activation of basalt

2014
To further reduce the emission of greenhouse gasses, raw materials that can be directly alkali activated are looked for. In this study the reaction of basalt with concentrated NaOH or KOH solutions to form geopolymer like materials is investigated. A comparison with alkali activated kaolinite is made.
Rahier, Hubert, Esaifan, Muayad, Wastiels, Jan, Khoury, Hani   +3 more
openaire   +1 more source