Practical Study on the Effect of Partial Replacement of Coarse Aggregate with Plastic Waste on some Normal Concrete Properties

المجلة: IOP Conference Series: Materials Science and Engineering

سنة النشر: 2020

تاريخ النشر: 2020-06-12

Abstract. Plastic waste management has become a burden and a threat for countries and major cities as well as a danger to environmental safety. The current report covers the ability of the concrete sector to use and recycle plastic wastes. The demand for concrete and raw materials for construction engineering has become very high in recent years because of urban development and the expansion of cities. Therefore, the use of this waste in civil and structural engineering is considered a successful way to get rid of plastic wastes properly to protect the environment. This research investigates the effectiveness of using plastic drinking water bottles (currently the highest plastic waste on the Iraqi market) as a partial substitution of the gravel in concrete. Plastic waste was added in different weight ratios of 2.5%, 5% and 10% as a partial substitute for the gravel and a cement mixture. A benchmark of 0% plastic wastes was prepared as a reference concrete for comparison purposes. The results show the possibility of using plastic waste, such as construction material. The results show a decrease in concrete strength by 12%, 29%, and 47%, and a reduction in concrete density by 10%, 16% and 31%, respectively. Research results show that this is useful to add plastic wastes for obtaining lightweight concrete.

A THEORETICAL ANALYSIS OF THERMO- STONE'S BENEFITS COMPARED TO BRICKS AND OTHER FREQUENTLY USED BUILDING MATERIALS IN IRAQ

المجلة: American Journal of Interdisciplinary Research and Development,

سنة النشر: 2022

تاريخ النشر: 2022-12-07

Abstract According to the current study, the country urgently needs to build many housing units due to the country's growing population. This shift in the housing and construction industry mainly depends on the availability of substitute building materials with high-quality specifications, long lifespans, and reasonable costs. The cost of housing units has significantly increased due to my country's economic woes, economic crises, and rapid population growth (the population will reach roughly 40 million by 2030). The purpose of this study is to concentrate on the properties of thermo-stone Positive to construct units in Iraq that have good specifications, are ecologically benign, can be implemented quickly, and are less expensive than conventional materials. The study's conclusions were focused on some factors: lightweight, thermal and acoustic insulation, construction cost , resistant to moisture , speed of construction and Other building features.

Evaluation of shear behavior of prepared recycled concrete aggregate concrete deep beam

المجلة: Periodicals of Engineering and Natural Sciences

سنة النشر: 2023

تاريخ النشر: 2023-04-01

ABSTRACT In this article, the shear behavior of a deep beam made of Recycled Aggregate Concrete (RAC) was analyzed. Rapid urbanization has presented a massive new activity that is necessary to meet the needs of the influx of people. Developments of all types, from housing to infrastructure, necessitate considerable input from both natural and monetary resources. The purpose of this study is to compare the strength and loading capacity of RAC to that of Naturally Aggregate Concrete (NAC). The samples were evaluated at a controlled deformation rate of 2mm/minute in the "Material Testing Laboratory of the Department of Civil Engineering," where this investigation was conducted. The researcher has chosen two different sizes of coarse totals to use throughout this study: those measuring 5mm to 15mm (60.2%) and those measuring 15mm to 25mm (40.3%). In support of her claims, the researcher presents a variety of charts and datasets in the following research. There is an overall drop in strength in the recycled aggregate concrete samples. The load-deflection curves and the techniques are depicted by which the specimens failed. Shear required beams' experimental data and predicted values. This study reveals that compared to natural aggregate concrete, recycled aggregate concrete has weaker compressive, flexural, and breaking tensile strengths. The maximum load-bearing strength of longitudinally supported beams built of "recycled and natural aggregate concrete" is also not significantly different.

THE FLEXURAL BEHAVIOR OF HOLLOW CORE CONCRETE SLABS WITH DIFFERENT SHAPE

المجلة: Journal of Applied Engineering Science

سنة النشر: 2023

تاريخ النشر: 2023-09-19

ABSTRACT Hollow slabs are slabs of reinforced concrete in which voids allow the concrete to be reduced in size. This type of slab results in reduced raw materials Consumption and increased insulating properties to achieve sustainability goals. This paper reported an experimental research program focused on the study of the bending behaviour of the elements of hollow slabs of normal-strength concrete. Three models of the one-way concrete slab were cast, It had dimensions of 1020 mm length, 420 mm width, and 100 mm thickness. The first model did not contain holes (solid) and the second model contained five circler opening holes with a 50 mm diameter, while the third model contained five square opening holes with 44 mm dimension, where the area of the second and third model were the same despite the difference in the shape of the opening. The results showed that the bearing capacity of the circular hollow core slab is higher by 12% compared to the square hollow core slab according to the type of voids and both of holes made the hollow core slab with a decrease in load capacity of 11% to 25% when compared to the solid slab. The solid slab has lower deflection value compared to the two hollow slabs whose weight is reduced by 23% compared to the solid slab.