ملخص الدراسة:

The quantities of waste glass in Gaza Strip have been increasing significantly without being recycled increasing the risk to public health due to the scarcity of land area. This growing problem of waste glass in the Gaza Strip can be alleviated if new disposal options other than landfill can be found. The main goal is to investigate the possibility to improve the compressive strength over a range of glass percentages. Waste glass is the least expensive of all the concrete constituents and is much less expensive than natural aggregates and sand, thus the idea is to replace as much of the natural aggregates and sand as possible to save money and to reduce the amount of disposable wastes, as well, but care has to be taken in order not to weaken the concrete by adding too much glass. Therefore, samples of the most common waste glass materials in Gaza Strip were collected and crushed to be included in concrete as a partial occupant in the concrete mix replacing fine and coarse aggregates, and then a standard series of: 72 slump tests, 144 mass density tests, 144 compressive strength tests, 18 pull-out tests, 18 flexural tests, and 18 splitting tensile tests were conducted. The output results obtained from this laboratory program showed reliable data points and promising further research horizons. For concrete mixed with coarse waste glass as a partial occupant instead of coarse aggregates, the optimum value of coarse waste glass to be used within the concrete mix with a water-cement ratio of 0.4 was determined as about 0.265, and the corresponding expected 28-days hardened concrete compressive strength was about 385 kg/cm2 compared with 300 kg/cm2. For concrete mixed with fine waste glass as a partial occupant instead of fine aggregates, the optimum value of fine waste glass to be used within the concrete mix with a water-cement ratio of 0.4 was estimated as almost 0.195, and the corresponding expected 28-days hardened concrete compressive strength was almost 400 kg/cm2. Finally, for concrete mixes containing the optimal portion of coarse or fine waste glass, it was concluded that there was negligible effects on the poll-out strength, considerable enhancement of the flexural strength, and slight reduction of the splitting tensile strength of the mix.

توثيق المرجعي (APA)