Results 1 to 10 of about 7,231 (151)

The effect that the pozzolanic reaction of metakaolin has on the heat evolution in metakaolin-cement mortars

Cement and Concrete Research, 2000
[EN]The hydration heat of mortars or concretes may be decreased by means of pozzolanic additions. Materials that exhibit pozzolanic activity can decrease the hydration heat by means of cement substitution, which increases the heat generated in hydration due to the pozzolanic reaction.
Frías, Moisés, Sánchez de Rojas, María Isabel, Cabrera, J.   +2 more
openaire   +2 more sources

3D‐Printed Geopolymer as a Basic Heterogeneous Catalyst for the Synthesis of α‐Cyanoacrylates Through the Knoevenagel Condensation

European Journal of Organic Chemistry, Volume 29, Issue 16, 25 April 2026.
3D‐printed geopolymers are presented as efficient and reusable heterogeneous catalysts for the Knoevenagel condensation. Under mild and green conditions, they promote the high‐yield synthesis of diverse α‐cyanoacrylates with remarkable stability and scalability.
Francesca T. Albino, Pedro A. M. Moro, Wanessa B. Menegaro, Luciano Senff, Marcus M. Sá, Dachamir Hotza   +5 more
wiley   +1 more source

Microstructure and Performance Optimization of Barley Husk Ash–Blended Mortars: A Sustainable Approach to Cement Substitution

Engineering Reports, Volume 8, Issue 4, April 2026.
Barley husk ash (BHA), an agricultural byproduct rich in pozzolanic oxides, was optimized as a sustainable cement substitute. Statistical modeling and experimental validation confirmed 22.75% BHA as the optimal replacement, enhancing mechanical and durability performance while advancing eco‐efficient construction practices.
Behailu Zerihun Hailemariam, Woubishet Zewdu Taffese, Duy‐Hai Vo, Mitiku Damtie Yehualaw   +3 more
wiley   +1 more source

Hybrid NDT‐Machine Learning Framework With SHAP‐Based Interpretation for Predicting Compressive Strength of Steel Slag Concrete

Engineering Reports, Volume 8, Issue 4, April 2026.
This study proposes a hybrid non‐destructive testing (NDT) and machine learning framework to predict the compressive strength of steel slag concrete. The integration of UPV, Rebound Hammer, and mixture parameters with interpretable ANN modeling enables accurate, sustainable, and explainable strength assessment for in situ concrete evaluation.
Matiur Rahman Raju, M. Tamim Parvez Tapu, Hasib Ahmed, Syed Ishtiaq Ahmad, Md. Mehedi Hasan, Md. Shahrior Alam, Mohammed Salauddin, Md. Shafiqur Rahman, Saif Ahmed Santo   +8 more
wiley   +1 more source

Processing–Property Mapping of Flash‐Sintered Wall Tile Bodies

International Journal of Applied Ceramic Technology, Volume 23, Issue 2, April 2026.
ABSTRACT This study investigates the effects of furnace temperature (900°C and 945°C), applied electric field (50–200 V.cm−1), and current density (50–150 mA.mm−2) on the physical properties and microstructure of flash‐sintered wall tile bodies. Water absorption, bulk density, and open porosity were measured and compared with an industrially fired ...
Zeynep Çetinkaya, Yeliz Köse, Betül Yıldız, Ender Suvacı, Rishi Raj   +4 more
wiley   +1 more source

Sustainable Materials for Transportation Infrastructures: Comparison of Three Commercially-Available Metakaolin Products in Binary Cementitious Systems

Infrastructures, 2018
Metakaolin is the only major natural pozzolan to be specified for use as a supplementary cementitious material in the United States. As a result, the metakaolin market for concrete has grown dramatically in the past 20 years.
Matthew S. Sullivan, Mi G. Chorzepa, Hiwa Hamid, Stephan A. Durham, S. Sonny Kim   +4 more
doaj   +1 more source

Do PCEs Adsorb Preferentially on OPC or Calcined Clay?

Journal of the American Ceramic Society, Volume 109, Issue 4, April 2026.
ABSTRACT In multi‐component binders, admixtures such as polycarboxylates (PCEs) may exhibit preferential adsorption onto one component. Hence, for the first time PCE adsorption on ordinary Portland cement (OPC) and calcined clay (CC) in an OPC/CC blend was quantified by separating the OPC and CC particles from the hydrated cement employing a ...
Jiaxin Chen, Johann Plank
wiley   +1 more source

The physico-mechanical influence of dehydroxylized activated local kaolin: A supplementary cementitious material for construction applications

Case Studies in Construction Materials, 2020
This work presents the effect of partially replacing metakaolin with Portland limestone cement to produce mortars for construction. Teleku Bokazo kaolin was explored as a SCM in the production of mortars.
Kwame K. Marfo, David Dodoo-Arhin, Benjamin Agyei-Tuffou, Emmanuel Nyankson, David O. Obada, Lucas N.W. Damoah, Ebenezer Annan, Abu Yaya, B. Onwona-Agyeman, Mark Bediako   +9 more
doaj   +1 more source

Non‐destructive and Destructive Structural Build‐Up of MgO–SiO2 Systems Enhanced by Hydration Agents

Journal of the American Ceramic Society, Volume 109, Issue 4, April 2026.
ABSTRACT This study investigated the effects of three hydration agents (HAs), Mg(CH3COO)2, MgCl2, and HCl, on the nondestructive and destructive structural build‐up of MgO‐SiO2 pastes through rheological characterization. Isothermal calorimetry, X‐ray diffraction (XRD), thermogravimetry/derivative thermogravimetry (TG‐DTG), scanning electron microscopy
Yiming Peng, Cise Unluer
wiley   +1 more source

Evaluation of the Pozzolanic Activity of Metakaolin, Glass Powder and Silica Powder for Use in Cementitious Mortars

Studia Universitatis Babes-Bolyai Chemia
The objective of this study is to evaluate the pozzolanic activity of metakaolin, glass powder and silica powder for use in cementitious mortars. Thus, metakaolin was produced by calcination at 700 °C of a clay soil from Burkina composed of kaolinite ...
Issiaka SANOU, Saada ZOUNGRANA, Moussa OUEDRAOGO, Ali SANOU, Younoussa MILLOGO   +4 more
doaj   +1 more source