Table of Content

Open Access Research Article

Assessment of AAR and Sulfate Attack on Wadi Gravel Concrete after 4 Years in Service

Received: 18 April 2021;  Published: 26 September 2021;  doi: 10.21926/rpm.2103038

Abstract

Wadi gravel is a local aggregate in Qatar that could contribute to enhanced sustainability by replacing expensive imported gabbro. The material needs to be processed before use to reduce sulfate content to acceptable levels. The paper presents the performance assessment of three full-sca [...]

0 9

Open Access Original Research

Production of Fermentable Sugars from Cassava Stem using Hybrid Pretreatment Technology

Received: 29 April 2021;  Published: 14 September 2021;  doi: 10.21926/rpm.2103037

Abstract

One of the crucial steps in the enzymatic hydrolysis of biomass is pretreatment. We investigated the applicability of a hybrid pretreatment method, This involved acid treatment followed by alkali before the production of fermentable sugars from cassava stem. The substrate was initially t [...]

0 160

Open Access Research Article

Phase Equilibrium in ZrO2-CeO2-Eu2O3 System at a Temperature of 1500 °C

Received: 24 May 2021;  Published: 02 September 2021;  doi: 10.21926/rpm.2103036

Abstract

The phase equilibria and structural transformations in the ternary ZrO2-CeO2-Eu2O3 system at 1500 °C were studied by X-ray diffrac [...]

56 215

Open Access Research Article

Utilization of Upgraded Recycled Concrete Aggregates and Recycled Concrete Fines in Cement Mortars

Received: 11 February 2021;  Published: 17 August 2021;  doi: 10.21926/rpm.2103035

Abstract

Waste concrete is the most predominant constituent material among construction and demolition waste. Current waste concrete recycling is limited to the use of recycled concrete aggregates as a road-base material and less as aggregates in new concrete mixes. Further, the production of rec [...]

72 254

Open Access Original Research

Bisphenol A Release from Orthodontic Clear Aligners: An In-Vitro Study

Received: 31 March 2021;  Published: 12 August 2021;  doi: 10.21926/rpm.2103034

Abstract

Bisphenol A (BPA) is a widely used synthetic compound that has been identified as an endocrine disruptor. It has been linked to adverse health effects such as developmental defects, infertility in both men and women, cardiovascular disease, and obesity. There has been increased interest [...]

53 240

Open Access Original Research

Effect of Recycled Rubber Particles on the Deicing Salt-Scaling Durability of Concrete

Received: 27 March 2021;  Published: 09 August 2021;  doi: 10.21926/rpm.2103033

Abstract

The present study investigated the effect of reused rubber particles (RRP) on the deicer salt durability of ordinary concrete. Four mixtures were designed, a control concrete (CC) and three other rubber concretes obtained by partial substitution of natural dune sand aggregate with reused [...]

58 287

Open Access Original Research

Experimental and Statistical Evaluation of the Interaction Effect of Recycled Aggregate and Water/Cement Ratio on Concrete Compressive Strength

Received: 07 March 2021;  Published: 28 July 2021;  doi: 10.21926/rpm.2103032

Abstract

The production of concrete using recycled aggregates, obtained from the processing of construction and demolition waste, is extensively practiced worldwide. However, the effect of simultaneous adding fine recycled aggregate and the recycled coarse aggregate on the mechanical properties o [...]

114 318

Open Access Original Research

Influence of Biopolymers on the Mechanical Behavior of Earth-Based Building Materials

Received: 09 March 2021;  Published: 26 July 2021;  doi: 10.21926/rpm.2103031

Abstract

Currently, the largest among the earth excavation sites in Europe are located in the Paris region. The soils excavated from these sites are often considered waste and are not valorized. With an increasing focus on sustainable development, the demand for low-carbon building materials is r [...]

127 358

Open Access Original Research

Assisted Phytostabilization of Acidic Polymetallic Mine Tailings Using Marble Waste and Native Plant Citrullus colocynthis: Effect on Soil, Plant, and Metal Uptake

Received: 29 December 2020;  Published: 22 July 2021;  doi: 10.21926/rpm.2103030

Abstract

This study aimed to assess the effectiveness of the phytostabilization ability of the native Moroccan plant Citrullus colocynthis on the neutralization of soil acidity and stabilization of metallic trace elements (MTEs) assisted by marble waste. Mine tailings (MT) co [...]

135 357

Open Access Research Article

Drainage in a Screw Press and Utilization of the Recovered Fibres after Thermo-Hydrolytic Disintegration of Waste Fibreboards

Received: 15 March 2021;  Published: 22 July 2021;  doi: 10.21926/rpm.2103029

Abstract

A thermo-hydrolytic disintegration process qualifies as a promising option for recycling the waste MDF and preserving the fibrous morphology of the recovered lignocellulosic fibre material. This study aims to include a drainage process between the thermo-hydrolytic disintegration and the [...]

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