Tensile and Liquid Absorption Properties of Polyester-based Composites as Alternative Marble Materials

Three polyester-based composite materials were prepared with different volume fractions of three types of fillers (i.e. cement, gypsum and limestone) with the aim of improving the tensile and liquid absorption properties of the former for the synthetic marble industry. The tensile strength, modulus of elasticity, toughness, ductility and liquid absorption percentage of the composites were characterized. Results revealed an increase in the modulus of elasticity, tensile strength and toughness of all prepared composites, as well as a decrease in their ductility, with increasing filler amount. The liquid absorption values of all composites increased with increasing filler content. The composites were able to absorb water extensively but absorbed benzene, kerosene and gasoil minimally.

Physical Mechanical Properties and Producing Areas of Greek Dimension Stones

The most important Greek ornamental stone types are marbles, limestones, schists, slates, travertines and sandstones. Since ancient times, quarryinghas been connected to history and civilisation, i.e., the white “Pentelikon” marble being famous for the construction of Parthenon (Acropolis). Greek marble industry is a dynamic sector, among the top world producers of dimension stones, concerning both the volume of production and exports. This paper describes the current status of the major ornamental stone producing areas in Greece and presents typical average values of physical mechanical properties of the extracted stones, determined in LITHOS laboratory.

Mechanical Properties of Concrete Incorporating Marble Powder as Partial Cement Replacement

Pakistan is a country that has an abundance of quarry deposits. The marble and ceramics industry, such as the construction industry, plays a pivotal role in the development of a country by contributing to the Gross Domestic Product (GDP). However, the marble and ceramics industry also adversely contribute to the growing solid waste management issues in the country, as Marble powder (MP), which comes from the marble industry, causes not only constant environmental and waste management problems, but also health issues for the people associated with the marble industry and surrounding residents. A lot of research has been done to reuse this MP waste productively. Since it contains significant amount of Silica content, it could potentially be used to partially substitute cement content in the development of eco-friendly sustainable concrete. The substitution of cement has become necessary due to the carbon footprint associated with the production of cement. This research is aimed at producing M30 grade concrete in which cement content is partially replaced with 5% and 10% MP and investigate its influence on the workability, compressive and flexural strength over time. It was found that MP could potentially be used to substitute cement content partially, thus contributing to sustainability in the construction industry, resolving the disposal of MP problems, and reducing cement dependency.

Pengujian Kuat Tekan Pada Beton Dengan Limbah Marmer Sebagai Subtitusi Agregat Kasar

Pengurangan jumlah pecahan marmer akibat hasil produksi industri marmer dapat dilakukan dengan menggunakan pecahan tersebut untuk material yang ada di dalam beton. Penelitian dilakukan dengan maksud agar hasil dari penggantian sebagian agregat kasar dengan limbah pecahan marmer yang ditinjau dari nilai kuat tekan beton dapat diketahui. Penelitian dirancang dengan variasi penggantian pecahan marmer sebesar 0%, 15%, 25%, dan 35%. Pada beton silinder yang memiliki ukuran 15 cm sebagai diameternya dan 30 cm sebagai tingginya, serta telah mencapai umur beton 7 hari, 14 hari, dan 28 hari akan diuji kuat tekannya. Besar kuat tekan yang paling tinggi ada pada variasi 25%, yaitu sebesar 33,22% pada umur beton 28 hari. Dibandingkan dengan nilai kuat tekan beton pada variasi 0% atau beton normal, pada variasi 25% mengalami kenaikan sebesar 4,02%.ABSTRACTReducing the number of aggregate marble waste as a result of the marble industry can be done by using this for concrete materials. This research was conducted with the effect of coarse aggregate substitution with marble waste on the compression strength value of concrete can be known. The research was committed to variations of marble aggregate substitution in 0%, 15%, 25%, and 35%. The compression test will be committed on cylindrical concrete, which has a diameter of 15 cm, a height of 30 at the age of 7, 14, and 28 days of concrete. The value of compression strength at the age of 28 days has the highest variation of 25%, equal to 33.22%. Compared with the compression strength value in variation 0% or average concrete, the variation of 25% has increased by 4.02%.

Buner Marble Industry within Environmental Legal Perspective

This study focuses on environmental issues caused by the marble industry in district Buner. District Buner is home to 247 marble factories, which operate in blatant violation of environmental protection laws. The factories and other projects are required to comply with certain provisions of the Pakistan Environmental Protection Act (PEPA), 1997 and Khyber Pakhtunkhwa Environmental Protection Act (KPEPA), 2014, respectively. By contrast, the marble industry in district Buner follows none of these laws which have led to serious environmental pollution, most characteristically water, air, and noise pollution. This paper exclusively discusses those provisions of KPEPA, 2014 which are being violated by these marble factories that have led to drastic environmental crisis in the area.