Results 61 to 70 of about 398 (163)

Understanding of alkali–silica reaction in lime‐pozzolana mortar incorporating pumice and borosilicate

Journal of the American Ceramic Society, Volume 108, Issue 12, December 2025.
Abstract To assess the efficacy of lime‐calcined clay binder in mitigating alkali–silica reaction (ASR) deterioration, this study identifies potential reaction product formation mechanisms in 2‐year‐old alkaline solution‐exposed mortar bars using X‐ray diffraction, micro‐computed tomography, scanning electron microscopy, and evaluates their influence ...
Adhora Tahsin, Ishrat Baki Borno, Taehwan Kim, Warda Ashraf   +3 more
wiley   +1 more source

Preparatory Phase of Major Earthquakes During Campi Flegrei Unrest (2020–2024)

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 10, October 2025.
Abstract The ongoing unrest at Campi Flegrei is posing significant challenges for hazard assessment and risk mitigation. This densely populated region has experienced more than 20,000 shallow earthquakes since 2020, driven by hydrothermal fluid accumulation beneath a mechanically strong caprock.
A. G. Iaccarino, M. Picozzi, G. De Landro, D. Spallarossa   +3 more
wiley   +1 more source

Enhancing the Strength and Durability Behaviour of Concrete Produced with Brown-Loamy Kaolin Clay Polymer

Journal of Building Materials and Structures
Clay is the most utilised natural pozzolana in Ghana, with the red-loamy clay in southern Ghana being the most widely studied. It has been established that clays geographical location presents differences in their optimum calcination temperatures and ...
Patrick Zievie, Peter Paa-Kofi Yalley, Humphrey Danso, Kwaku Antwi   +3 more
doaj   +1 more source

Physicochemical properties of silicate-calcium micro-filler obtained by thermolysis of calcium hydrosilicates stabilized with sucrose

MATEC Web of Conferences, 2018
Calcium hydrosilicates obtained by grinding a mixture of natural pozzolana (flask), CaO and a sucrose solution are characterized by the ability to self-disperse during heat treatment to form a highly dispersed silicate-calcium dispersion (SCD).
Shoshin Evgeny, Ivashchenko Yuri
doaj   +1 more source

An Experimental Study on Portland Pozzolana Cement Mixed with Natural Hydrocolloids

Journal of Applied Engineering Sciences
Abstract To make a structure sturdier, the construction materials must be of higher quality. To enhance the structural qualities of fresh concrete, or improve the properties of hardened concrete, additives are added to concrete during the mixing process.
B. Naresh Kumar, C. Anbalagan
openaire   +1 more source

The Impact of DNA as a Chemical Admixture for Cementitious Materials

Advanced Materials Technologies, Volume 10, Issue 15, August 7, 2025.
DNA molecules are added to cement pastes and their effects on rheology and hydration time are studied. DNA's chemical structure is composed of polysaccharide and phosphate groups, which are active functional groups in different commercial chemical admixtures: Viscosity modifiers and superplasticizers.
Alexander Mezhov, Antonina Goncharov, Semion Zhutovsky, Konstantin Kovler, Charles E. Diesendruck   +4 more
wiley   +1 more source

Pre-treatment of desalination feed seawater by Jordanian Tripoli, Pozzolana and Feldspar: batch experiments [PDF]

Chemical Industry and Chemical Engineering Quarterly, 2011
In this research, composites of layered double hydroxide (LDH) with three Jordanian natural raw materials: Tripoli (T), Pozzolana (P) and Feldspar (F) were prepared by co-precipitation and have been used for feed seawater pre-treatment.
AIMAN E. AL-RAWAJFEH, KHALDOON AL-WHOOSH, REYAD AL DWAIRI, AHMAD AL-MAABERAH, AMER TARAWNEH   +4 more
doaj  

Lightweight Concrete with an Agricultural Waste – Buckwheat Husk

Medžiagotyra, 2016
This paper presents a parametric experimental study which investigates the potential use of buckwheat husk wastes (as an aggregate in concrete) and opoka combination for producing a lightweight composite.
Giedrius VAICKELIONIS, Virginija VALANČIENĖ   +1 more
doaj   +1 more source

Development of UHPC Mixtures Utilizing Natural and Industrial Waste Materials as Partial Replacements of Silica Fume and Sand

The Scientific World Journal, 2014
In the exploratory study presented in this paper, an attempt was made to develop different mixtures of ultrahigh performance concrete (UHPC) using various locally available natural and industrial waste materials as partial replacements of silica fume and
Shamsad Ahmad, Ibrahim Hakeem, Mohammed Maslehuddin   +2 more
doaj   +1 more source

Characterization of Fiber Reinforced Self-Consolidating Mortars for Use in Patching Damaged Concrete

Latin American Journal of Solids and Structures
This research aims to study the effect of supplementary cementitious materials (SCMs) such as quarry dust limestone (QDL) and natural pozzolana (NP) on the performance of fiber reinforced self-consolidating repair mortars (FR-SCRMs).
Amar Benyahia, Mohammed Ghrici, Said Choucha, Ahmed Omran   +3 more
doaj   +1 more source