Now showing items 1-10 of 726
New method to assess the pozzolanic reactivity of mineral admixtures by means of pH and electrical conductivity measurements in lime:pozzolan suspensions
(Inst Ciencias Construccion Eduardo Torroja, 2014-01-01)
A very simple method based on electrical conductivity and pH measurements was proposed for assessing reactivity of pozzolans. Calcium hydroxide: pozzolan water suspensions were monitored by means of measurements of electrical ...
Brazilian sugar cane bagasse ashes from the cogeneration industry as active pozzolans for cement manufacture
(ELSEVIER SCI LTD, 2011)
For proper management of wastes and their possible recycling as raw materials, complete characterization of the materials is necessary to evaluate the main scientific aspects and potential applications. The current paper ...
Valorisation of sugarcane bagasse ash (SCBA) with high quartz content as pozzolanic material in Portland cement mixtures
Portland cement (OPC) production is one of the most contaminating greenhouse gas producing activities. In order to reduce OPC consumption, several alternatives are being assessed, and the use of pozzolanic material is one ...
Indirect and direct Chapelle’s methods for the determination of lime consumption in pozzolanic materials
(IBRACONSão Paulo, 2015)
In this work, comments are made about indirect methods and direct Chapelle’s method applied to the determination of the reactivity of pozzolanic materials. The Chapelle’s method is based on the lime-pozzolan reaction and ...
Lime/pozzolan/geopolymer systems: Performance in pastes and mortars
Use of lime as construction material is limited mainly by low initial strength. These properties can be improved by adding pozzolanic materials, but the evolution of the reaction usually needs older ages than 7 days. ...
Study of the pozzolanic reaction kinetics in sugar cane bagasse-clay ash/calcium hydroxide system: kinetic parameters and pozzolanic activity
(THOMAS TELFORD PUBLISHING, 2009)
This paper presents a study of the pozzolanic reaction kinetics between calcium hydroxide and a mixture of sugar cane bagasse with 20 and 30% of clay, burned at 800 and 1000 degrees C (SCBCA) by electrical conductivity ...
Biomass-Derived from Bamboo Leaf Ash: Pozzolanic Reactivity
(Materials Research Forum Llc, 2018-01-01)
Bamboo leaf ash (BLA) was assessed as a pozzolanic material in pastes and mortars. Differently from most of research performed, the BLA studied in this paper was obtained through an auto-combustion process. This material ...
Pozzolanic activity of calcined halloysite-rich kaolinitic clays
(Elsevier Science, 2017-10)
The aim of this study is to determine the pozzolanic activity of clays with high content of halloysite/kaolinite, and to evaluate the influence of halloysite/kaolinite ratio and halloysite morphology in the development of ...
Production of agroindustrial ashes with pozzolanic activity via acid leaching, conjugated burning and ultrafine grinding
(ANTAC - Associação Nacional de Tecnologia do Ambiente Construído, 2020)
Evolution of the mechanical properties of a tropical soil stabilized with lime and ash of rice rind
The ash of rice rind is a pozzolanic material that reacts with the calcium hydroxide (Ca (OH)2) forming bonding composites, when finely worn out and in water presence. Considering this behavior, the objective of the present ...