Results 21 to 30 of about 2,655 (181)

Mechanochemical treatment of Serbian kaolin clay to obtain high reactive pozzolana [PDF]

Journal of the Serbian Chemical Society, 2013
Mechanochemical treatment of Serbian kaolin clay was carried out in a planetary ball mill using two different milling media, hardened steel or zirconia vials and balls. The samples obtained with various milling times were characterized by the particle
Mitrović Aleksandra, Zdujić Miodrag
doaj   +1 more source

Studies about the heat of hydration developed in mortars with natural and by-product materials

Materiales de Construccion, 2000
The heat of hydration developed in reactions of mortars and concretes can be sensibly reduced using pozzolanic materials. However, the decrease of the heat of hydration is not directly proportional to the amount of cement substituted, because of the heat
M. I. Sánchez de Rojas, M. Frías, J. Rivera   +2 more
doaj   +1 more source

Barley Straw Ash: Pozzolanic Activity and Comparison with other Natural and Artificial Pozzolans from México

BioResources, 2015
The construction industry is one of the largest and most active growth sectors worldwide. It presents an important environmental impact, and one way to reduce the impact of the construction activity is to substitute pozzolanic materials for ordinary ...
Carlos Cobreros, José Luis Reyes-Araiza, Alejandro Manzano-Ramírez, Rufino Nava, Mario Rodríguez, Mauricio Mondragón-Figueroa, Luis Miguel Apátiga, Eric M. Rivera-Muñoz   +7 more
doaj   +1 more source

Pyroprocessing and the optimum mix ratio of rice husks, broken bricks and spent bleaching earth to make pozzolanic cement

Heliyon, 2019
This paper presents the findings of an experimental investigation on optimizing pozzolanic activity of a blend of Rice Husks (RH), Spent Bleaching Earth (SBE) and Broken Bricks (BB) to form pozzolana that would have pozzolanic activity comparable to ...
Protus Nalobile, Jackson Muthengia Wachira, Joseph Karanja Thiong'o, Joseph Mwiti Marangu   +3 more
doaj   +1 more source

Tratamentos térmico e químico para remoção de óxidos alcalinos de cinzas de capim elefante

Química Nova, 2014
Elephant grass ash (EGA) was produced at 700 °C, with two different treatments: hot water (EGAhw) or acid solution (EGAas). The efficiency of the treatments at removing the potassium oxide was evaluated with the aim of using the EGA as a pozzolanic ...
Erika Y. Nakanishi, Ernesto Villar-Cociña, Sérgio F. Santos, Michelle S. Rodrigues, Pedro S. Pinto, Holmer Savastano Junior   +5 more
doaj   +1 more source

Pozzolanic activity of flint powder

Sustainable Construction Materials and Technologies (SCMT), 2019
It was tested whether powdered flint is able to reach pozzolanic properties comparable to fly ash. The flint aggregates were crushed and milled to three different grain size fractions comparable to coal fly ash. The powdered flint was characterized and subsequently used as a substitute in mortar prisms.
Osterhus, Lennart, Ditz, Florian, Schmidt-Döhl, Frank Michael   +2 more
openaire   +1 more source

Enhancing durability of steam‐cured precast concrete culverts using SCMs: A comparative study with delithiated beta spodumene

Structural Concrete, EarlyView.
Abstract Steam curing is commonly used to manufacture precast culverts to accelerate early strength development. This study investigates the effect of supplementary cementitious materials (SCMs) on the permeability properties of steam‐cured precast concrete culverts.
Saugat Humagain, Prabir Kumar Sarker, Faiz Uddin Ahmed Shaikh, Daksh Baweja   +3 more
wiley   +1 more source

Durability performance of a high‐performance fiber‐reinforced concrete for bridge applications

Structural Concrete, EarlyView.
Abstract This paper investigates the durability performance of a coarse‐aggregate high‐performance fiber‐reinforced concrete (HPFRC) developed as a cost‐efficient material solution for precast bridge applications. A comprehensive experimental program was conducted to assess the resistance of the material to the principal deterioration mechanisms ...
Rolando Baldiviezo, Rafael Ruiz, Borja Regúlez, Carmen Andrade, Hugo Corres, Valle Chozas‐Ligero, Leonardo Todisco   +6 more
wiley   +1 more source

Influence of processing methods on the strength activity index for sludge as a supplementary cementitious material

Case Studies in Construction Materials
Utilizing activated sludge as a partial substitute for cement can both curb cement consumption and address sludge reuse in an economically and environmentally-friendly manner.
Youzhi Yang, Ziye Kang, Zhuofan Wu, Jinrui Zhang, Dongshuai Hou, Biqin Dong   +5 more
doaj   +1 more source

Fineness Effect on Pozzolanic Activity of Cu-Ni Slag in Cemented Tailing Backfill

Advances in Materials Science and Engineering, 2020
This paper presents the experimental results of the fineness effect on the pozzolanic activity of Cu-Ni slag in cemented tailing backfill. Cement paste and cemented tailing backfill samples that without or contain Cu-Ni slag with various grinding times ...
Wenyuan Xu, Xiaocong Yang, Wenchen Li, Lijie Guo   +3 more
doaj   +1 more source