نتایج جستجو برای: recycled bassanite

تعداد نتایج: 10631  

2017
Gyanendra Regmi Buddhima Indraratna Long Nghiem Guru Prasad Long Duc Nghiem

Acidic groundwater generated from pyrite oxidation in acid sulphate soil (ASS) is a major geoenvironmental problem in Australia. This study aims to evaluate recycled concrete as a reactive material in permeable reactive barriers (PRBs) for the remediation of acidic groundwater in lowlying ASS floodplains. Laboratory experiments were systematically conducted to investigate the acid neutralisatio...

2001
Moon C. Won

In 1995, the Texas Department of Transportation (TxDOT) began reconstruction in Houston on a section of IH-10 with continuously reinforced concrete pavement (CRCP). The unique aspect of this project was the use of crushed concrete as both coarse and fine aggregates in the new concrete. No virgin aggregates were used. The primary objectives of this study were to evaluate (1) the material propert...

2013
Ji-Yeon Roh Min-Hyuck Kim Woo Il Kim Young-Yeul Kang Sun Kyoung Shin Jong-Guk Kim Jung-Hwan Kwon

OBJECTIVES Potential environmental risks caused by chemicals that could be released from a recycled plastic product were assessed using a screening risk assessment procedure for chemicals in recycled products. METHODS Plastic slope protection blocks manufactured from recycled plastics were chosen as model recycled products. Ecological risks caused by four model chemicals -di-(2-ethylhexyl) ph...

2017
Vivian W. Y. Tam C. M. Tam

Owing to the comprehensive building redevelopment programmes in Hong Kong, there is a huge volume of concrete waste generated that will soon exhaust all the available landfill areas. As such, recycled aggregate is advocated. However, the use of recycled aggregate has been confined to lower-grade applications until now, such as the lower layers of a pavement structures, e.g. capping and sub-base...

Journal: :Chemical research in toxicology 2000
A M Vinggaard W Körner K H Lund U Bolz J H Petersen

The use of recycled paper for the manufacture of food contact materials is widespread, but very little is known about the presence of potential contaminants in the paper. The purpose of this study was to assess the worst-case migration of estrogenic active compounds using extracts of paper for household use. Twenty different brands of kitchen rolls, nine of which were made from recycled paper a...

2017
Huaxin Liu Jianwei Yang Xuxu Xue

In order to study the basic mechanical properties of basalt fiber reinforced recycled aggregate concrete, the concrete mix ratio, the length and the volume mixing ratio of chopped basalt fiber yarn are designed for changing factors. A total of 324 specimens have been completed for this investigation. The compressive strength, splitting tensile strength, elastic modulus and axial compressive str...

2014
Ronbanchob Apiratikul

This research studied recycled waste by the Recyclable Material Bank Project of 4 universities in the central region of Thailand for the evaluation of reducing greenhouse gas emissions compared with landfilling activity during July 2012 to June 2013. The results showed that the projects collected total amount of recyclable wastes of about 911,984.80 kilograms. Office paper had the largest amoun...

2016
Francisca Guadalupe Cabrera-Covarrubias José Manuel Gómez-Soberón Jorge Luis Almaral-Sánchez Susana Paola Arredondo-Rea María Consolación Gómez-Soberón Ramón Corral-Higuera

The difficult current environmental situation, caused by construction industry residues containing ceramic materials, could be improved by using these materials as recycled aggregates in mortars, with their processing causing a reduction in their use in landfill, contributing to recycling and also minimizing the consumption of virgin materials. Although some research is currently being carried ...

2016
Tomasz M. Stawski Alexander E.S. van Driessche Mercedes Ossorio Juan Diego Rodriguez-Blanco Rogier Besselink Liane G. Benning

The formation pathways of gypsum remain uncertain. Here, using truly in situ and fast time-resolved small-angle X-ray scattering, we quantify the four-stage solution-based nucleation and growth of gypsum (CaSO4·2H2O), an important mineral phase on Earth and Mars. The reaction starts through the fast formation of well-defined, primary species of <3 nm in length (stage I), followed in stage II by...

2002
Hani E. Naguib Anjan Mukhopadhyay Jin Wang Chul B. Park

The effects of recycled-branched polypropylenes on their rheological properties and foamability are studied and compared with the virgin sample in this paper. The main idea is to explore the possibility of using recycled materials to make the acceptable foam products. The recycled polypropylenes showed the lower melt strength due to the disentanglement. However, the viscosity at a high shear ra...

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