Studies on Exciting the Activity of Waste Glass Powder by Hydrothermal Activation

The effect of hydrothermal activation indifferent temperature and pressure conditions on the pozzolanic activity of waste glass powder was discussed. The waste glass powder was treated at 108°C, 0.15MPa, 116°C, 0.18MPa and 121°C, 0.2MPa for 2h in an autoclave respectively after milling to 4215cm2/g. Mortar was made with untreated and hydrothermal activated waste glass power replacement of cement at 20% respectively, then tested for compressive strength at 3, 7, 14 , 28 and 90 days. Results showed that compressive strength of cement mortar had varying degrees of decline when replacing cement with untreated waste glass powder, comparing to the control one. Decline amplitude was large at early age and small at late age. Activity of waste glass powder was significantly improved after hydrothermal treatment. Compressive strength of mortar improved as temperature and pressure elevated, obtaining optimal strength at 121°C, 0.2MPa. Compressive strength of mortar with hydrothermal activated glass powder was higher than that with untreated glass powder at all age with 20% cement replacement. Compressive strength increased 5.3% ~ 13.6% at 3 d, 6.8%~9.7% at 28 d, 9.7% ~ 17.7% at 90 d. The essence of hydrothermal activation was the corrosion of water in the glass.

Download Full-text

The Research on the Strength of Cement Mortar with Different Particle Size of Waste Glass Powder

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1082.265 ◽

2014 ◽

Vol 1082 ◽

pp. 265-269 ◽

Cited By ~ 1

Author(s):

Guo Jun Ke ◽

Yan Chao Wang ◽

Pin Yu Zou ◽

Dai Nian Zeng

Keyword(s):

Particle Size ◽

Compressive Strength ◽

Glass Powder ◽

Cement Mortar ◽

Waste Glass ◽

Optimum Size ◽

Best Value ◽

Waste Glass Powder ◽

Baseline Group ◽

Mixed Water

To study the strength of cement mortar with different particle size of waste glass powder, grinding and screening the colorless waste glasses to 38-53,53-75,75-150,150-300,300-600μm, and as supplementary cement materials replacing the cement of cement mortar at 5,10,15,20,25,30%, respectively. Meanwhile divide the experiment into two parts:containing water reducer or not and add fly ash as comparison at the same time, measuring the flexural and compressive strength of cement mortar for 28 days. It is concluded that the flexural and compressive strength of cement mortar are decreased when mix with water reducer with maintaining the dosage of water;The optimum size and amount of waste glass powder in the cement mortar keep the same whether it is mixed water reducer or not; The flexural and compressive strength for 28days of the cement mortar reach the best value and differ with the baseline group very few whether it's mixed water reducer or not.

Download Full-text

Application of Waste Glass Powder as a Partial Cement Substitute towards more Sustainable Concrete Production

International Journal of Engineering Research in Africa ◽

10.4028/www.scientific.net/jera.31.77 ◽

2017 ◽

Vol 31 ◽

pp. 77-93 ◽

Cited By ~ 14

Author(s):

Oluwarotimi M. Olofinnade ◽

Julius M. Ndambuki ◽

Anthony N. Ede ◽

Colin Booth

Keyword(s):

Compressive Strength ◽

Glass Powder ◽

Activity Index ◽

Waste Glass ◽

Glass Content ◽

Partial Replacement ◽

Powder Materials ◽

Cement Replacement ◽

Sustainable Concrete ◽

Waste Glass Powder

Use of waste materials in concrete is now a global trend for efficient waste management so as to achieve a sustainable green environment and with the added advantages of preserving the natural resources as well as producing a better performing concrete. This study examined the properties of concrete containing ground waste glass powder (GP) as partial replacement for cement. The waste glass was finely grounded into powder and the morphology imagery of the powder materials was carried out using scanning electron microscopy (SEM). Moreover, the chemical composition of the glass powdered material was determined using X-ray fluorescence (XRF). Laboratory tests were carried out to determine the strength activity index, workability, split tensile and compressive strength properties of the concrete with 0%, 15%, 18%, 21%, 24%, 27% and 30% partial replacement of cement with the ground waste glass powder. The results showed that the oxides composition of the glass powder meets the requirements for pozzolanic material, while the SEM morphology shows materials of amorphous flaky solid masses, and based on the 28-day strength activity index, concrete containing 21% cement replacement shows a higher strength index above therecommended 75%. It was also observed that workability of the concrete reduced with increase in percentage glass content while significant improvement of the compressive strength of the concrete was achieved at 21% cement replacement, after which a decrease in strength with increasing percentage glass content was observed. The revealed results were confirmed by the microstructural examination using SEM showing a denser concrete at 21% cement replacement but increase porosityas the glass content increases. However, a decrease in split tensile strength was observed with increasing glass content. The results clearly showed that it is possible to produce moderate strength sustainable concrete for structural application using 20% glass powder as cement replacement.

Download Full-text

Thermophysical Properties of Cement Mortar Containing Waste Glass Powder

Crystals ◽

10.3390/cryst11050488 ◽

2021 ◽

Vol 11 (5) ◽

pp. 488

Author(s):

Oumaima Nasry ◽

Abderrahim Samaouali ◽

Sara Belarouf ◽

Abdelkrim Moufakkir ◽

Hanane Sghiouri El Idrissi ◽

...

Keyword(s):

Thermal Conductivity ◽

Specific Heat ◽

Thermophysical Properties ◽

Glass Powder ◽

Cement Mortar ◽

Soda Lime ◽

Waste Glass ◽

Soda Lime Glass ◽

Volumetric Specific Heat ◽

Waste Glass Powder

This study aims to provide a thermophysical characterization of a new economical and green mortar. This material is characterized by partially replacing the cement with recycled soda lime glass. The cement was partially substituted (10, 20, 30, 40, 50 and 60% in weight) by glass powder with a water/cement ratio of 0.4. The glass powder and four of the seven samples were analyzed using a scanning electron microscope (SEM). The thermophysical properties, such as thermal conductivity and volumetric specific heat, were experimentally measured in both dry and wet (water saturated) states. These properties were determined as a function of the glass powder percentage by using a CT-Meter at different temperatures (20 °C, 30 °C, 40 °C and 50 °C) in a temperature-controlled box. The results show that the thermophysical parameters decreased linearly when 60% glass powder was added to cement mortar: 37% for thermal conductivity, 18% for volumetric specific heat and 22% for thermal diffusivity. The density of the mortar also decreased by about 11% in dry state and 5% in wet state. The use of waste glass powder as a cement replacement affects the thermophysical properties of cement mortar due to its porosity as compared with the control mortar. The results indicate that thermal conductivity and volumetric specific heat increases with temperature increase and/or the substitution rate decrease. Therefore, the addition of waste glass powder can significantly affect the thermophysical properties of ordinary cement mortar.

Download Full-text

Fresh, Mechanical Properties and Impact Resistance Behavior of Eco-Friend Self-Compacted Concrete

Al-Nahrain Journal for Engineering Sciences ◽

10.29194/njes.22030208 ◽

2019 ◽

Vol 22 (3) ◽

pp. 208-212

Author(s):

Sheelan M. Hama ◽

Alhareth M. Abdulghafor ◽

Mohammed Tarrad Nawar

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Flexural Strength ◽

Polyethylene Terephthalate ◽

Glass Powder ◽

Impact Resistance ◽

Waste Glass ◽

Slump Flow ◽

Waste Glass Powder ◽

Self Compact Concrete

In this work, waste glass powder from broken windows and plastic fibers from waste polyethylene terephthalate bottles are utilized to produce an economical self-compact concrete. Fresh properties (slump flow diameter, slump Flow T50, V. Funnel, L–Box), mechanical properties (Compressive strength and Flexural strength) and impact resistance of self-compact concrete are investigated. 15% waste glass powder as a partial replacement of cement with five percentages of polyethylene terephthalate plastic waste were adopted: 0% (reference), 0.5%, 0.75%, 1%, 1.25% and 1.5% by volume. It seems that the flow ability of self-compact concrete decreases with the increasing of the amount of plastic fibers. The compressive strength was increased slightly with plastic fiber content up to (0.75%), about 4.6% For more than (0.75%) plastic fiber. The compressive strength began to decrease about 15.2%. The results showed an improvement in flexural strength and an impact on the resistance in all tested specimens’ content of the plastic fibers, especially at (1.5%) fibers.

Download Full-text

Durability of High Volume Glass Powder Self-Compacting Concrete

Applied Sciences ◽

10.3390/app10228058 ◽

2020 ◽

Vol 10 (22) ◽

pp. 8058

Author(s):

Samia Tariq ◽

Allan N. Scott ◽

James R. Mackechnie ◽

Vineet Shah

Keyword(s):

Particle Size ◽

Glass Powder ◽

High Volume ◽

General Purpose ◽

Waste Glass ◽

Self Compacting Concrete ◽

Cement Replacement ◽

Chloride Diffusivity ◽

Waste Glass Powder ◽

Binder Ratio

The transport characteristics of waste glass powder incorporated self-compacting concrete (SCC) for a number of different durability indicators are reported in this paper. SCC mixes were cast at a water to binder ratio of 0.4 using glass powders with a mean particle size of 10, 20 and 40 µm and at cement replacement levels of 20, 30 and 40%. The oxygen permeability, electrical resistivity, porosity and chloride diffusivity were measured at different ages from 3 to 545 days of curing. The amount and particle size of the incorporated waste glass powder was found to influence the durability properties of SCC. The glass incorporated SCC mixes showed similar or better durability characteristics compared to general purpose (GP) and fly ash mixes at similar cement replacement level. A significant improvement in the transport properties of the glass SCC mixes was observed beyond 90 days.

Download Full-text

Fabrication and Characterization the Properties of Decorative Tile from White Cement and Waste Glass Powder

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.894.85 ◽

2021 ◽

Vol 894 ◽

pp. 85-93

Author(s):

Tanikan Thongchai ◽

Krisana Poolsawat

Keyword(s):

Compressive Strength ◽

Essential Oil ◽

Water Absorption ◽

Glass Powder ◽

Physical And Mechanical Properties ◽

Waste Glass ◽

Curing Time ◽

White Cement ◽

Waste Glass Powder ◽

Orange Essential Oil

This research mainly focused on the properties of decorative white cement tiles which made from waste glass and white cement. The ratio of waste glass powder and white cement were studied at 10 : 90, 15 : 85, 20 : 80, 30 : 70, 40 : 60, 50 : 50, 60 : 40 and 70 : 30 by using water content at 30 %wt. All components were mixed and cast into the mould. Decorative white cement tiles were curing at 14, 21 and 28 days. In order to characterize physical and mechanical properties, all tiles were measured density, water absorption and compressive strength. According to the results, it can be obviously seen that density increased and water absorption decreased with increasing waste glass powder content. The highest compressive strength of around 36.5 MPa was found at 20 %wt of waste glass powder. However, compressive strength decreased with increasing waste glass powder over 20 %wt (waste glass powder 20: white cement 80). It was found that the lowest compressive strength of around 30.58 MPa was found at 70 %wt of waste glass powder. Curing time also affected properties as it was found that increasing curing time to 28 days resulted in increasing of density and compressive strength. In order to study how long does essential oil last on decorative white cement tiles, the orange essential oil at 1, 5 and 10 %wt were added into the white cement paste by using waste glass powder : white cement at 20 : 80 with 30 %wt of water. Decorative white cement tiles were smelled by 30 people every morning for 30 days and it can be found that 10 %wt of orange essential oil last longest on the decorative white cement tiles with 22 days.

Download Full-text