Results 31 to 40 of about 4,199 (222)
Effects of the secondary minerals of the natural pozzolans on their pozzolanic activity
Cement and Concrete Research, 2008 Abstract Natural pozzolans have been widely used as substitutes for Portland cement, because of their binding properties. Some of them are natural volcanic rocks which contain secondary minerals such as clays and zeolites corresponding to products of the alteration of the rock.
Habert, Guillaume +4 more
openaire +3 more sources
Effect of Chemical Additives on Carbon Dioxide in the Sustainable Production of Portland Pozzolanic Cement [PDF]
محیط زیست و مهندسی آبThis research aims to investigate the reduction of CO2 emissions in the cement production process by producing pozzolanic portland cement (PPC) with the characteristics of ordinary portland cement (OPC) using quality-improving chemical additives ...
Aliakbar Derakhshani +2 more
doaj +1 more source
, 2022 ABSTRAKKabupaten Padang Pariaman memiliki sumber daya pozzolan yang belum termanfaatkan secara optimal. Pozzolan adalah bahan yang mengandung senyawa silika dan alumina. Untuk pemanfaatan yang optimal dilakukan analisis dan karakterisasi potensi pozzolan
Reni Desmiarti +7 more
core +1 more source
KARAKTERISASI KOMPONEN AKTIF POZZOLAN UNTUK PENGEMBANGAN PORTLAND POZZOLAN CEMENT (PPC)
, 2018 Pozzolan merupakan bahan yang mengandung Silica dan Alumina, dalam bentuknya yang halus dan adanya air akan bereaksi secara kimia dengan Kalsium Hidroksida pada suhu kamar dimana akan membentuk senyawa yang mempunyai sifat seperti semen.
Siswati, Nana Dyah +2 more
core +1 more source
Present Environment and Sustainable Development, 2018 Given the increasing exploitation of clay in Morocco for ceramic industry and for the purpose of the benefit reuse of this resource, a study is conducted in order to carry out the identification and characterization of Miocene clay after doping with ...
Mesrar Laila +3 more
doaj +1 more source
Multi-objective optimization of a steady-state rotary dryer
CLEI Electronic Journal, 2021 The multi-objective optimization of a direct current rotary dryer that operates with pozzolan in a Paraguayan company is detailed in this article. Three objective functions in steady state are minimized using a NSGA-II algorithm, these are: (1) moisture ...
César Oviedo +2 more
doaj +1 more source
Heats of hydration and pozzolan content of portland-pozzolan cements
Journal of Research of the National Bureau of Standards, 1952 Methods are described for the measurement of the approximate heat of solution in acid of portland-cement^-pozzolan mixtures. Examples are given of the estimation of the heat of hydration of portland-pozz olan cements. Determinations of the amount of material undissolved in the calorimeter, as well as the heats of solution, were applied to the problem ...
E.S. Newman, L.S. Wells
openaire +1 more source
, 2013 Temporary vertical excavations in cohesionless (granular soils) pose a problem for conventional ‘two-phase’ soil mechanics theory since non-zero collapse height is not predicted using the classical ‘dry/saturated’ shear strength criterion, given that ...
Stanier, Samuel A, Tarantino, Alessandro
core +1 more source
Effects of Using Pozzolan and Portland Cement in the Treatment of Dispersive Clay
The Scientific World Journal, 2013 Use of dispersive clay as construction material requires treatment such as by chemical addition. Treatments to dispersive clay using pozzolan and Portland cement, singly and simultaneously, were carried out in this study.
A. H. Vakili, M. R. Selamat, H. Moayedi
doaj +1 more source
Improvement of geotechnical properties of silty sand soils using natural pozzolan and lime
International Journal of Geo-Engineering, 2018 In this study the effect of different amounts of lime and natural pozzolan on geotechnical properties of a silty sand soil has been investigated. To do this, 20 treatments were prepared with adding five lime levels of 0, 1, 3, 5 and 7% (by weight) and ...
Nader Abbasi, Masoud Mahdieh
doaj +1 more source