Physical Properties of Sustainable Concrete Bricks with Glass and Polyethylene Terephthalate Scales Wastes as Replacements for Coarse Aggregate

In order to improve the sustainable construction in Peru, throughout the recycling of non-biodegradable materials, a study of the influence of glass and Polyethylene terephthalate (PET) wastes in the physic properties of concrete bricks was carried out. They were made with a 1:5:2 cement, fine aggregate, and waste relation. Three proportions were studied named P-01, P-02, and P-03. Each proportion had a different content of glass and PET wastes, as a result, it was found that the average brick’s absorption was increased with PET wastes and it was reduced with glass wastes. On the other hand, the compressive strength value increased with glass wastes and it was reduced with PET wastes. Finally, it was found that P-02 was the most efficient concrete brick proportion to develop a sustainable construction, obeying the requirements of the Peruvian national building regulations.

Reuse of Glass waste as a partial replacement to fine aggregates in concrete

As human societies grow, the problem of waste management becomes one of the pressing issues that need to be addressed. Recycling and reuse of waste are effective waste management measures that prevent pollution and conserve natural resources. In this study, the possibility of using glass waste as an alternative was used as a partial weight substitute for fine aggregates with replacement ratios of 10, 20, 30, and 40% by the weight, and formed into test models (15 cm * 15 cm ) cube and (15 cm * 30 cm) cylinder, then matured and tested their strength compression and tensile strength at the age of 7 and 28 days and compared with a reference or conventional concrete with a mixing ratio (1: 1.5: 3) as well as testing its workability on fresh concrete. The results showed the possibility of using crushed glass wastes in concrete as a good alternative to fine aggregates, up to 30%. The compressive strength and tensile strength results at this ratio were 92.6% and 80.86% at the age of 28 days, respectively.

Effect of Borosilicate Glass Wastes and Synthetic Silica on Cement Products Properties

This paper presents the findings of research study on the effect of borosilicate glass wastes on properties of cement paste and mortar. The borosilicate glass contains three times less alkali than soda-lime glass and about 12 % of boron oxide, so pozzolanic activity of borosilicate glass is three times higher compared to soda-lime glass. In order to increase the pozzolanic activity of glass precipitated synthetic silica was used. Mathematical models were used in order to test the effect of synthetic silica on pozzolanic activity of borosilicate glass. Test results indicate that replacement of 1 % of borosilicate glass by synthetic silica increased the pozzolanic activity up to 9.4 mg CaO/g of additive. By adding 5 % of borosilicate glass instead of cement, the standard compressive strength is reduced by about 20 %. However, complex additive of borosilicate glass (2–5 %) and synthetic silica (0.5 %) increased initial compressive strength of cement mortars to 10 %.

Effect of Addition of Alccofine on the Compressive Strength of Cement Mortar Cubes

In the modern era, many research works are going on throughout the world for finding suitable cementitious material for the replacement of cement since it causes environmental pollution. In this order Fly ash, Silica fume, GGBS, Metakaolin, Micro materials, Quartz powder, etc. are tried out for replacing partially or fully the cement in concrete. A new ultrafine material called Alccofine (AF) which is manufactured from glass wastes is tried out for replacing partially in this research. Compressive strength is one of the important properties of cement. Strength tests are not made on neat cement paste because of difficulties of excessive shrinkage and subsequent cracking of neat cement. Cement mortar of 1:3 mix proportion is used to cast the cubes having an area of 50 cm2 are used for the determination of compressive strength of cement as per IS: 4031-1988 (Part-6). The graded Indian Standard sand (Ennore Sand -ES) confirming to IS: 650-1991 is used for preparing the cubes. In the same mix proportion, the same size cubes are cast with the River Sand (RS) to study the difference of the compressive strength between the Indian standard sand and river sand. Ordinary Portland cement (OPC) and Portland Pozzolana Cements (PPC) are used. The present study is the influence of Alccofine on cement mortar cubes by replacing the cement by Alccofine with various proportions like 5%, 10%, 15%, 20% were cast and tested in the laboratory as per Indian Standard 4301-1988 (Part-6) and the results were analysed and presented in the form of charts and graphs. It is observed that the early age strength is obtained for all the combinations but 10 percent of Alccofine yields more strength than other dosages. Doi: 10.28991/esj-2021-01265 Full Text: PDF

Utilization of Waste Glasses as Supplementary Cementitious Materials

Wastes of Glass are recognized as pozzolanic material. This study aims to investigate utilization of local glass wastes in Sudan as supplementary cementitious materials. Two glass wastes specimens having different colors are procured from a local source namely Sudanese Emirati Glass and Metal Company (SEGMAL). Then thy are ground to micro sizes producing two types of glass powders, clear white glass powder (W-GP) and colored glass powder (C-GP). The two Specimens are characterized using tests specified in American Society for Testing and Materials ASTM C311. These tests include chemical properties using X-ray Fluorescence (XRF), Loss on Ignition (LOI), Insoluble Residue (IR), also physical properties such as fineness, specific gravity, water requirement, and strength activity index (SAI). This study shows that at 7 days W-GP and C-GP produced SAI of 84% and 87% at 7-days respectively. These values are more than the 75% of SAI’s requirements of ASTM C618. Both specimens have outperformed the control OPC mix at 28 days by producing SAI of 108.68% and 123.82% for GP-W and GP-C respectively.

EXPERIMENTAL INVESTIGATION ON LIGHT WEIGHT CELLULAR CONCRETE USING RECYCLED GLASS AND PLASTIC WASTE

<p>Cellular Lightweight Concrete (CLC) also known as Foamed concrete is one of the most significant type of concrete used for construction purposes due to its various advantages and usages over traditionally produced concrete. The rapid urbanization has led to the enormous increase in wastes being disposed of. This paper aims at identifying the possibility of using recycled materials such as crushed glass and plastic wastes in foam concrete as substitute filler material for fine river sand. A protein based foaming agent was adopt for this study. The workability and strength of different mixes using powdered glass and plastic wastes were investigated. In this research study foam concrete blocks were prepared according to the designed proportions to attain the maximum density of 1900kg/m^3.In this project, the mixing of recycled glass wastes 5%, 10%, 15% and recycled plastic wastes 1%, 3% &amp; 5% were added as a filler in foam concrete. The 7, 14 and 28 days compressive strength, flexural strength, split tensile strength of each batch of concrete were studied and compared with conventional foam concrete. The study showed that the incorporation of recycled glass and plastic waste in conventional foam concrete is effective and it will useful for load bearing wall applications.</p>

Trials of reuse the Pb-containing wastes of crystal glass factories into useable new materials

Background Lead-containing glass wastes from crystal factories have environmentally harmful problems. In the current work, the reduction and the feasibility of recycling of such waste through the preparation of glass in the ternary system containing wastes—silica'sand—soda-lime-silica glass, were investigated in different ceramic or composite materials. Results The ceramic samples are characterized by crystallization of kilchoanite (Ca3Si2O7) in addition to mixed Ce oxides [i.e., CeO2 and Ce2O3] in Pb-containing waste alone. In the other ceramic samples containing the three constituents, low quartz, tridymite, cristobalite, and wollastonite were developed. The microstructures of the later ceramics show scattered needles and interlocked ones spread in glassy matrix. The density, porosity, and compression strength values of ceramic samples were between 0.392 and 2.743 g/cc, 9.33% and 30.19%, and between 10.26 and 83.25 KN/mm2, respectively. However, sintered Pb glass-containing wastes have the highest porosity, lowest density, and compression strength. The leachability of Pb in ceramic samples, according to the standard method by ASTM-D3987 (American Standard for Testing Materials, 2012), was between 0.025 and 0.007 mg/L which is lower than the legal value (5 mg/L). Conclusion The present product can be used in insulation, cladding brick, and as refractory (up to 900 °C) for the samples containing the three constituents.