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Review on Impact of Construction Waste Landfill on Environment and its Reutilization

Sivamani Jagan, Kamaleshwar S.

Ecological Engineering & Environmental Technology

2022

Vol. 23, iss. 6

233--242

In several countries, the use of recycled coarse aggregate in construction materials is recommended; however, the use of organic matter is restricted because it can produce significant changes in compressive strength. In terms of reaching a conclusive viewpoint regarding the research topic, secondary data collection analysis has been selected. It is essential to utilize the recycled and by-products wastages to prepare alternative materials as this can be useful in generating a significant amount of fine concrete aggregate. As a result, it reduces the extreme exploration of essential natural resources and meets the requirements of natural concrete aggregates by using the alternative and recycled fine concrete aggregate. Moreover, the alternative materials come with similar properties and physical behaviour as they sustain the durability and compound stability of the concrete aggregate through the use of recycled cement. The disposal of industrial wastes can cause extreme environmental harm that can be reduced via recycled cement. However, it has been noted that the presence of harmful materials can result in issues regarding durability. Thus, it is essential to arrange materials for recycled cement that can be effective for construction activities. In order to maintain environmental sustainability and reduce environmental hazards, it is important to utilize the wastages for generating alternative concrete aggregates such as crushed rocks. Thus, this paper reviews the environmental effects of concrete waste pollutants and its sustainable reutilization to promote a cleaner environment and offer benefits to the construction industries with a positive effect.

Machinability properties of particleboards made with addition of raspberry stem chips (Rubus idaeus L.)

Januszewski Adam, Szymanowski Karol

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

2019

No. 105

71--75

The article describes vulnerability to machinability particleboards with addition raspberry stem chips (Rubus idaeus L.). Machinability can be analyzed with using of numerous machinability indicators. In this article was assumed as machinability criterions, cutting resistance during milling and drilling regards to percentage contribution of raspberry stem chips. The addition of alternative raw material didn’t deteriorated machinability properties based on axial forces during drilling and cutting force during milling. However, at higher amount of mentioned above raw material, increase of torque.

Podatność na obróbkę skrawaniem płyt wiórowych z dodatkiem łodyg maliny właściwej (Rubus idaeus L.). Istnieje wiele kryteriów oceny skrawalności materiałów drewnopochodnych. Jednym z nich są opory skrawania. Artykuł opisuje wpływ dodatku alternatywnego surowca na opory skrawania podczas wiercenia i frezowania. Przeanalizowano zarówno opory skrawania podczas obróbki frezowaniem jak i wierceniem w zależności od zawartości surowca pochodzącego z łodyg maliny właściwej. Dodatek alternatywnego surowca nie spowodował pogorszenia skrawalności określonej na podstawie siły osiowej rejestrowanej podczas wiercenia i sił skrawania występujących podczas frezowania. Zauważono natomiast, że przy wyższej zawartości wspomnianego wcześniej surowca alternatywnego wzrosła wartość momentu obrotowego podczas wiercenia.