this study is concerned with the synthesizing of cu-zn nano-ferrite particles in the laboratory applying simple techniques. the morphology of the synthesized nano-particles was analyzed using transmission electron microscopy (tem), and the minerals were identified using x-ray diffraction (xrd). the nano material was used to replace 1- 4 percent by weight of portland cement in cement pastes and ...

For safe disposal of the large volume concrete waste generated during decommissioning Fukushima Daiichi Nuclear Power Station (F1NPS), state Cs and Sr contamination in must ideally be estimated advance planning. are primarily adsorbed by calcium silicate hydrate (C–S–H) cementitious materials. However, amount adsorption varies greatly with Ca/Si mole ratio (C/S ratio) C–S–H presence or absence ...

According to the U.S. Office of Science and Technology Policy, research misconduct is fabrication, falsifi cation, and plagiarism.1 Plagiarism is defi ned as “the appropriation of another person’s ideas, processes, results, or words without giving appropriate credit.” It is an act of deception. It involves stealing someone else’s work and lying about it afterward. The digital age has made it ea...

Abstract This research aimed to present the improvement of cementitious material in high-volume fly ash using only one alkali activator. Fly was used as a partial replacement for Portland cement type I, varying from 0 60% by weight binder. Concentrations NaOH 0.00 1.25 molar were Paste properties and mortar compressive strength at ages 3, 7, 14, 28, 60, 90 days water curing investigated. The re...

This paper presents a comparative study on the effects of high temperature (~500°C) on carbonated calcium silicate-based cement (CSC), hydrated ordinary Portland cement (OPC), and hydrated OPC with 20% fly ash (FA) paste samples. The CSC is primarily composed of calcium–silicate minerals with different calcium to silica atomic ratios, such as wollastonite, rankinite, and pseudowollastonite. The...

Carbon nanotubes (CNTs) have excellent mechanical properties and can be used to reinforce cement-based materials. On the other hand, the reaction product of carbonation with hydroxides in hydrated cement paste can reduce the porosity of cement-based materials. In this study, a novel method to improve the strength of cement paste was developed through a synergy of carbon nanotubes decorated with...

AIM To investigate the chemical interaction of calcium hydroxide with the corticosteroid triamcinolone acetonide in Ledermix Paste and in Odontopaste, a new steroid/antibiotic paste. METHODOLOGY Validated methods were developed to analyse the interaction of calcium hydroxide in two forms, Pulpdent Paste and calcium hydroxide powder, with triamcinolone acetonide within Odontopaste and Ledermix...