Results 31 to 40 of about 398 (163)

Types of lime binders in mortars used for the construction of the Ming Great Wall of China and their importance for the development of a conservation strategy

Built Heritage, 2022
The most obvious characteristics of the Ming Great Wall are external masonry walls made of natural stones, bricks and lime mortars. According to the chemical and mineralogical compositions of the original bedding and pointing mortars, dolomitic lime ...
Tanja Dettmering, Shibing Dai
doaj   +1 more source

Study of the effect of calcium nitrate, calcium formate, triethanolamine, and triisopropanolamine on compressive strength of Portland-pozzolana cement

Case Studies in Construction Materials, 2023
This study aims to assess the effect of using some chemical admixtures including Calcium nitrate tetrahydrate (CN) and Calcium formate (CF), Triethanolamine (TEA), and Triisopropanolamine (TIPA) on the early-age compressive strength of Portland cement ...
Aliakbar Derakhshani, Arezoo Ghadi, Seyed Ebrahim Vahdat   +2 more
doaj   +1 more source

A Comparison between Natural Pozzolana and Fly Ash Replacements on the Mechanical Properties of Concrete

The International Conference on Civil Infrastructure and Construction, 2023
This study investigates the effect of Natural Pozzolana (NP) and Fly Ash (FA) substitutes on concrete's mechanical and microstructural properties. Mixes containing 10 - 50 % cement substitute ratios were prepared and tested for flexure and compressive strength after 28 days of curing.
Aburumman, Mervat O., Al-diseet, Malak M., MohsenMohamed O., Abdel-Jaber, Mu'tasim, Naji, Khalid Kamal A A, Abu Taqa, Ala   +5 more
openaire   +2 more sources

Mortars From Punic and Hellenistic–Roman Solunto: Materials, Formulations, and Technology

Archaeometry, EarlyView.
ABSTRACT This study presents an archaeometric investigation of 18 hydraulic rendering and bedding mortars from Punic and Hellenistic–Roman Solunto (NW Sicily). The research aimed to characterize raw materials, reconstruct manufacturing sequences, and evaluate technological proficiency through mineralogical and petrochemical analyses.
G. Montana, G. Polizzi, C. Portale, M. Gasparo Morticelli, L. Randazzo   +4 more
wiley   +1 more source

Combined Effect of Natural Pozzolana and Steel Fibre on the Mechanical Properties of Normal Concrete Subjected to a High Temperature

Slovak Journal of Civil Engineering
The objective of this work is to study the effects of high temperatures on the compressive strength, flexural tensile strength, and toughness indices of ordinary concrete reinforced with 0.5% steel fibre.
Boulakoud Bilel
doaj   +1 more source

Impact of Natural Pozzolan And The Degree of Circularity of Aggregates on The Thickness, Strength and Durability Of ITZ in Concrete ( Modeling and Experimentation)

Aceh International Journal of Science and Technology, 2023
The interfacial transition zone (ITZ) significantly negatively impacts the structural performance of concrete. This negative impact can be ameliorated by introducing mineral additions into the concrete.
Lazhar Loumachi, Bouzidi Mezghiche, Ahmed Abderraouf Belkadi   +2 more
doaj   +1 more source

Microbial Deterioration Potential and Mitigation Strategies in Blended Cement Structures: A Review

Advances in Civil Engineering, Volume 2026, Issue 1, 2026.
Microbial‐induced deterioration (MID) is a threat to the durability of cement‐based materials (CBMs) particularly in sewer and wastewater systems. Whereas blended cements incorporating supplementary cementitious materials (SCMs) offer environmental benefits such as reduced carbon (IV) oxide (CO2) emissions and enhanced mechanical performance, their ...
Beatrice Wanjiru Mwangi, Genson Murithi, Reginah Ngari, Jackson Muthengia, Nancy Mweni Paul, Li Qingchao   +5 more
wiley   +1 more source

Properties of Mortars with Natural Pozzolana and Limestone-Based Blended Cements

ACI Materials Journal, 2011
This paper presents the results of an experimental investigation on the consistency, compressive strength, water sorptivity, chloride ion permeability, electrical resistivity, and sulfate resistance of mortars made with plain and blended cements. Plain (CEM I 42.5 R) and blended cements, including portland pozzolana cements (CEM II A-P 42.5 R and CEM ...
Guneyisi, Erhan, Gesoglu, Mehmet, Ozturan, Turan, Mermerdas, Kasim, Ozbay, Erdogan   +4 more
openaire   +3 more sources

Effect of Alkali - Activated Natural Pozzolan on Mechanical Properties of Geopolymer Concrete

Civil and Environmental Engineering, 2022
As an alternative to Ordinary Portland Cement (OPC), the alkali-activated binders have been developed with better technical characteristics and more extended durability.
Mohammed Zainab M., Abdulhameed Ali A., Kazim Hamid K.   +2 more
doaj   +1 more source

Investigation on the Potential of Bacteria‐Coated Jute Fiber for Enhancing Mechanical Properties and Self‐Healing Capabilities in Concrete

Advances in Civil Engineering, Volume 2026, Issue 1, 2026.
Concrete faces challenges such as low tensile strength, susceptibility to cracking, and limited self‐healing capabilities. To address these issues, natural fibers have gained attention as reinforcements due to their high specific strength, stiffness, biodegradability, and renewability.
Tadelech Abrham Adisu, Belachew Asteray Demiss, Yemanebirhan Emiru Ashagrie, Tesfaye Alemu Mohammed, Yiglet Mebrat Getu, Dereje Hailu Tufa, Walied A. Elsaigh, Se Jin Choi   +7 more
wiley   +1 more source