Results 11 to 20 of about 4,051 (214)

Effects of Partial Substitution of Ordinary Portland Cement With Stone-Cutting Dust, Limestone, and Natural Pozzolana on Compressive Strength and Microstructure

open access: yesAdvances in Civil Engineering
Rapid industrialization and urban growth have driven a rising demand for cement, yet ordinary Portland cement (OPC) production remains energy-intensive and a major source of CO2 emissions.
Nancy Mweni Paul   +5 more
doaj   +2 more sources

The influence of natural pozzolana mineralogical composition in the properties of blended cement

open access: yesMateriales de Construccion, 2002
The pozzolana activity is the main property of the active additions but, in order to select them, we have to consider - between other factors- its mineralogical composition with a great influence, not only in the active component, but also in other ...
M. Gener Rizo, J. M. Alonso Lavernia
doaj   +4 more sources

Effect of different pozzolana on hardening process and properties of hydraulic binder based on natural anhydrite

open access: yesJournal of Civil Engineering and Management, 2012
The study deals with peculiarities of hydration and development of hardening structure as well as durability properties pertaining to composite anhydrite cement pozzolana binder (ACP) with different pozzolana (P).
Jadvyga Žvironaitė   +3 more
doaj   +4 more sources

Coupled Effect of temperature and additions on the rheological behavior of concrete equivalent mortars (CEM) [PDF]

open access: yesMATEC Web of Conferences, 2020
The aim of this work is to study the influence of mineral additions on the rheological behavior of low impact environmental concrete with its concrete equivalent mortar (CEM) at different temperatures.The experimental study is carried out on cement-based
Dada El Hadja   +3 more
doaj   +1 more source

From Ancient Techniques to Modern Solutions: In Situ Synthesis of C-S-H for Sandstone Conservation. [PDF]

open access: yesAdv Sci (Weinh)
Herein, this work presents a paleo‐inspired approach to synthesizing and optimizing C‐S‐H‐based grouting mortars for conserving the sandstone of Beishan Grottoes, Dazu Rock Carvings, China. By achieving an optimal recipe compatible with natural sandstone, this work demonstrates the pivotal role of hydrogen bonding in the adhesion between C‐S‐H mortars ...
Jia M   +9 more
europepmc   +2 more sources

Development of Concrete Incorporating Recycled Aggregates, Hydrated Lime and Natural Volcanic Pozzolan

open access: yesInfrastructures, 2021
Recycling of construction and demolition waste is a central point of discussion throughout the world. The application of recycled concrete as partial replacement of mineral aggregates in concrete mixes is one of the alternatives in the reduction of ...
Natividad Garcia-Troncoso   +2 more
doaj   +1 more source

Effectiveness Assessment of Superplasticizer Admixtures: Case of Self-compacting Concrete Reinforced with Fine Mineral Fillers

open access: yesSelected Scientific Papers: Journal of Civil Engineering, 2022
The use of superplasticizers in concrete production has become a common practice, especially when a high fluidity is required. On the other hand, the risk of segregation and the stability of these mixtures is ensured by the incorporation of a large ...
Oualit Mehena, Irekti Amar, Hami Brahim
doaj   +1 more source

Natural pozzolana of micro and nano-size as cementitious additive: resistance of concrete/mortar to chloride and acid attack

open access: yesCogent Engineering, 2021
The goal of the current paper is to study the effect of natural pozzolana (NP) when ground to a micro and nano size on some concrete properties. Syria is rich in natural pozzolana with an estimated quantity of nearly 1 billion tonnes.
Aref M. Al-swaidani
doaj   +1 more source

An Experimental Study on the Effect of Water on Historic Brickwork Masonry [PDF]

open access: yes, 2020
Architectural heritage is deeply threatened by extreme weather events due to ongoing climatic change. Since these phenomena are becoming more and more serious, their effects cannot be neglected when a reliable assessment of a historic masonry structure ...
Corradi, Marco   +2 more
core   +1 more source

Effect of thermo-activation on mechanical strengths and chlorides permeability in pozzolanic materials

open access: yesCase Studies in Construction Materials, 2018
The present research aimed to study the combined effects of natural pozzolana and curing on the compressive and flexural strengths of mortars; it also investigated the chloride permeability of concrete.
M. Elbar   +4 more
doaj   +1 more source

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