Results 11 to 20 of about 7,633 (204)

Clays for Low-Carbon Cements: Overview, Progress, and Challenges. [PDF]

open access: yesGlob Chall
This review provides a critical overview of recent developments of activated clays to function as artificial pozzolans. After a thorough description of the clays that yield good pozzolanic performances, selected examples are given on thermal and mechanical activations. Chiefly, general correlations are extracted from reported data despite its scattered
Koufany I   +4 more
europepmc   +2 more sources

WORKABILITY AND COMPRESSIVE STRENGTH OF CONCRETE CONTAINING BINARY CEMENT, MIXED FINES, AND SUPERPLASTICIZER

open access: yesFacta Universitatis. Series: Architecture and Civil Engineering, 2023
Growing awareness about the influence of buildings on the environment has resulted in a need for more ecologically friendly buildings made of inexpensive but long-lasting construction materials.
Oluwaseun Afolabi Oni, Chinwuba Arum
doaj   +1 more source

Study of excavated clays with kaolinite and dickite as pozzolanic materials

open access: yesDyna, 2022
In the present study, samples of excavated waste clays were thermally activated at 550 °C and 650 °C, these clays with low kaolinite content and presence of dickite have a limited industrial exploitation but are widely availability in developing ...
Hernan Yanguatin   +2 more
doaj   +1 more source

Is the clay "exchange capacity" concept wholly applicable to pozzolans?

open access: yesMateriales de Construccion, 2004
One of the most characteristic properties of clays is their "cation exchange capacity", otherwise known as their "exchange capacity ". The research reported in this article shows that for various reasons some natural and artificial pozzolans exhibit this
R. Talero
doaj   +1 more source

Lime stabilisation for earthworks: a UK perspective [PDF]

open access: yes, 2014
Lime stabilisation is a versatile technique applied during earthworks operations. Modern soil recycling units are much more efficient at pulverising fill material and intermixing the added binder/water than machinery available 20 years ago.
Beetham P   +37 more
core   +2 more sources

Effect of three natural pozzolans in portland cement hydration

open access: yesMateriales de Construccion, 2003
Natural pozzolans have been used since ancient times and continues to be used today. The chemistry and morphological composition of natural pozzolans and their particle size distribution allows classifying them as more or less reactive pozzolan.
V. Rahhal, R. Talero
doaj   +1 more source

Influence of substrate annealing on inducing Ti3+ and oxygen vacancy in TiO2 thin films deposited via RF magnetron sputtering [PDF]

open access: yes, 2018
Nano-crystalline TiO2 has been prepared by RF magnetron sputtering at varied substrate temperatures ranging from 200 to 500 °C. The alteration of oxygen and titanium atom in TiO2 at uppermost surface is clearly observed on the effect of annealing ...
Abdullah, S.A.   +6 more
core   +1 more source

Setting times of Portland cement–metakaolin–fly ash blends / Portlandcemenčio, metakaolino ir lakiųjų pelenų mišinių rišimosi terminai

open access: yesJournal of Civil Engineering and Management, 2011
In the present study two pozzolanic materials are used, Metakaolin (MK) and Fly Ash (PFA), as binary and ternary partial replacement binders with Portland cement (PC) to investigate their effect on standard consistence and setting times of paste.
David Snelson   +2 more
doaj   +1 more source

Evaluation of the Pozzolanic Activity of Glass Powder in Three Maximum Grain Sizes

open access: yesMaterials Research, 2021
The addition of pozzolans has a potentially important role in the cement industry since using waste from other industries has important environmental benefits, including reduced CO2 emissions from cement production.
Alexandre Lopes Borges   +5 more
doaj   +1 more source

Fabrication SiO2 -NiO foam via replication technique for steam methane reforming catalyst at low temperatures [PDF]

open access: yes, 2021
Porous ceramic is a type of material that has highly open and partially interconnected pores. It has a wide range of applications, which include catalyst support, filtration, adsorption and separation.The aim of this study is to fabricate Silica-Nickel
Muda, Rizamarhaiza
core  

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