Results 161 to 170 of about 375,303 (201)

Pozzolanic Reactivity of Carbonated High-Calcium Fly Ash: A Mechanism Study [PDF]

Construction and Building Materials
This research investigates the impact of accelerated carbonation treatment on the pozzolanic reactivity of high-calcium fly ash (HFA) by monitoring the reaction heat of HFA/carbonated HFA (CFA)-calcium hydroxide (CH) blends and elucidates the underlying ...
Wenyu Liao, Yongjia He, Hongyan Ma
exaly   +2 more sources

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Pozzolanic Reactivity of Pure Calcined Clays

Applied Clay Science, 2016
Abstract Eight reference clay samples, 4 kaolinitic, 3 smectitic and 1 illitic clay, were purified and thermally treated in order to determine their pozzolanic reactivity in cementitious materials. The clays were calcined in a fixed-bed electrical furnace at temperatures ranging between 500 °C and 900 °C.
Jan Elsen, Jørgen Skibsted, Özlem Çizer   +2 more
exaly   +3 more sources

Pozzolanic Reactivity of the Supplementary Cementitious Material Pitchstone Fines by Thermogravimetric Analysis

Journal of Polymer Research, 2009
Thermogravimetric (TG) analysis was applied to the characterisation of the pozzolanic reaction in mortars containing the supplementary cementitious materials (SCMs) pitchstone fines (PF) and fly ash (FA) as partial replacements for Portland cement (PC ...
Paul Thomas, A S Ray
exaly   +2 more sources

Pozzolanic reactivity of lightweight aggregates

Cement and Concrete Research, 1990
Abstract Over recent years more attention has been given to the influence of the aggregate-cement paste interfacial zone on the various properties of concrete. For the lightweight aggregate - cement paste interface, it is believed that the interface is characterized by a mechanical interlocking in combination with a chemical interaction in the form ...
Min-Hong Zhang, Odd E. Gjørv
openaire   +1 more source

Quick monitoring of pozzolanic reactivity of waste ashes

Waste Management, 2009
This article proposes a quick method of monitoring for pozzolanic reactivity of waste ashes by investigating the electrical conductivity of the suspension at an elevated temperature. This suspension is obtained by mixing tested pozzolan with an ordinary Portland cement (OPC) solution produced by mixing ordinary Portland cement with water.
Suppachai, Sinthaworn, Pichai, Nimityongskul   +1 more
openaire   +2 more sources

Development of Blended Pozzolans Using Natural Pozzolan and Ground Glass Through Reactivity and Durability Investigations

Advances in Civil Engineering Materials, 2022
Abstract This study emphasizes the reactivity evaluation of pozzolans and the durability performance of blended cements containing pozzolans. A ground glass, three raw natural pozzolans, and two blended pozzolans of ground glass and raw natural pozzolan were examined for reactivity using the modified lime-reactivity test, the strength ...
Mahipal Kasaniya, Michael D. A. Thomas
openaire   +1 more source

Grinding and pozzolanic reactivity of quartz powders

Powder Technology, 1999
Abstract Cement-based materials are in wide use — partly in the belief that their reactivity is due to their glassy nature. The question we wish to investigate is: how specific is the link between the pozzolanic reaction and glassy materials? In order to answer it, we take the case of quartz, a material often used in cement-based matrices, reputed to
J.C Benezet, A Benhassaine
openaire   +1 more source

Effects of the Pozzolanic Reactivity of nanoSiO2 on Cement-Based Materials

Cement and Concrete Composites, 2015
Abstract The aim of this work is to understand the characteristics of the pozzolanic reactivity of nanoSiO2 from studies of its pozzolanic reaction kinetics, morphology and structure of the hydrates and the influences of these features on the properties of cement-based materials, so as to explore a more targeted way of using nanoSiO2 in cement or ...
Pengkun Hou, Surendra P. Shah, Xin Cheng
exaly   +2 more sources

Effect of Curing Temperature and Glass Type on the Pozzolanic Reactivity of Glass Powder [PDF]

Cement and Concrete Research, 2014
Glass cullet has been considered for use in concrete as a fine aggregate or a supplementary cementitious material (SCM). Glass reaction kinetics depends on both temperature and glass composition.
Kyle A Riding, Mohammadreza Mirzahosseini   +1 more
exaly   +2 more sources

Evaluation of the Metakaolin Pozzolanic Reactivity in Cement Pastes

Materials Science Forum, 2008
The pozzolanic reactivity of a commercial metakaolin (MK) manufactured in Brazil, was evaluated in pastes prepared with a type II Portland cement, when used in cement substitution degrees from 10 to 40 mass % by thermal analysis techniques. The reactivity during the early stages of hydration was studied in real time from Non-Conventional Differential ...
Armando Lucas Cherem da Cunha, Jardel Pereira Gonçalves, Frank K. Cartledge, Romildo Dias Toledo Filho, Jo Dweck   +4 more
openaire   +1 more source