scholarly journals Evaluation of Softening of Clayey Soil Stabilized with Sewage Sludge Ash and Lime

2018 ◽  
Vol 4 (4) ◽  
pp. 743 ◽  
Author(s):  
Kamyar Norouzian ◽  
Nader Abbasi ◽  
Jahangir Abedi Koupai
Keyword(s):  
Sewage Sludge ◽  
Soil Stabilization ◽  
Clayey Soil ◽  
Hydrated Lime ◽  
Sewage Sludge Ash ◽  
Optimum Water Content ◽  
Strength Tests ◽  
New Type ◽  
Sludge Ash ◽  
Optimum Water

Production of sewage sludge have raised increasing concerns due to negative environmental effect. Sewage Sludge Ash (SSA) is used as a new type of additive for clay. Laboratory tests were performed on clay samples to study the mechanism of sewage sludge ash (SSA) and Hydrated Lime (HL) soil stabilization. Different SSA contents (0, 5, 10, 15%) and hydrated lime (0, 1, 3 and 5%) were added to the soil samples. 288 samples were prepared, and unconfined compressive strength tests were carried out. The samples were tested under optimum water content and also saturated conditions with three replications. The results of the coefficient of softening indicated that by adding SSA and hydrated lime to clay soil simultaneously, the stabilized clay soils can be applied in the moist and saturated condition. According to the results, the samples of SSA contents 0% with hydrated lime 5% and SSA contents 10% with hydrated lime 5% can be placed in the vicinity of moisture.

scholarly journals THE USE OF SEWAGE SLUDGE AND ITS ASH IN CONSTRUCTION AND AGRICULTURE INDUSTRY: A REVIEW

2019 ◽  
Vol 81 (5) ◽  
Author(s):  
Mohd Amin Shafii ◽  
Eunice Chia Mei Ling ◽  
Ekarizan Shaffie
Keyword(s):  
Chemical Composition ◽  
Sewage Sludge ◽  
Soil Stabilization ◽  
Treatment Plant ◽  
Sewage Sludge Ash ◽  
Local Municipalities ◽  
Agriculture Industry ◽  
The World ◽  
Cement Mixture ◽  
Sludge Ash

Harmful sewage sludge generated from wastewater treatment plant being disposed to landfill has long caused major anxiety in local municipalities around the world. In line with the concept of sustainable development practice being adopted around the world, more efforts has looked deeper into ways to reuse this waste material and one of it was the ash generated from this material. This paper review the use of sewage sludge and sewage sludge ash (SSA) in construction and agriculture industry through a multi-faceted review of previous researches done in various industries. Besides reducing the amount of waste in landfill, this solution can also contribute to the reduction of natural resources consumption. It examines in detail how the various burning temperature can affect the sewage sludge ash as well as the potential usage of this ash in asphalt, concrete and cement mixture, soil stabilization and agriculture either as a substitute material, or as a raw and enhancement material. The various chemical composition in this ash enable the SSA to be used in application in multiple industry as each of the respective chemical composition bring enhancement to the end product respectively.

Study of the Potential of Adhesion to the Substrate of Masonry and Tensile in the Flexion in Mortars of Coating with Gray of the Sewage Sludge

2020 ◽  
Vol 1012 ◽  
pp. 256-261
Author(s):  
João Victor da Cunha Oliveira ◽  
Leila Soares Viegas Barreto Chagas ◽  
Frankslale Fabian Diniz de Andrade Meira ◽  
Arnaldo Manoel Pereira Carneiro ◽  
Antônio Acácio de Melo Neto
Keyword(s):  
Tensile Strength ◽  
Sewage Sludge ◽  
Calcination Temperature ◽  
Partial Replacement ◽  
Sewage Sludge Ash ◽  
Flexural Tensile Strength ◽  
Hydraulic Binder ◽  
Strength Tests ◽  
Sludge Ash

This work evaluates mortars using sewage sludge calcined at temperatures of 600°C and 700°C as a hydraulic binder replacing the cement. The percentages incorporated by mass to replace the Portland cement were 10%, 20% and 30%, using the 1:3:0,60 (cement: sand: factor a/c) trace. Sludge ash was characterized and tensile strength at flexion as well as tensile strength (pullout test) were evaluated. As a way of performing a comparison with conventional mortars, the same tests were carried out using reference mortar. The results of the flexural tensile strength tests indicated that results were higher than the reference traces of the mortars with the calcined sludge at a temperature of 700°C, a factor related to the increase of the calcination temperature and the incorporated percentage. With respect to the tests on the determination of tensile strength, it was observed that the specimens submitted to the test suffered rupture in the mortar, and that the calcination temperature of the sewage sludge was not influenced. The results obtained with the mortars using sewage sludge ash with partial replacement of the cement are shown within the normative standards and approximate to the results obtained with the tests executed with the reference mortar.

Effect of NaCl and MgCl2 on the hydration of lime-pozzolan blend by recycling sewage sludge ash

2021 ◽  
pp. 127759
Author(s):  
Yifan Zhou ◽  
Jianxin Lu ◽  
Jiangshan Li ◽  
Chris Cheeseman ◽  
Chi Sun Poon
Keyword(s):  
Sewage Sludge ◽  
Sewage Sludge Ash ◽  
Sludge Ash

scholarly journals Applying Mixture of Municipal Incinerator Bottom Ash and Sewage Sludge Ash for Ceramic Tile Manufacturing

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3863
Author(s):  
Deng-Fong Lin ◽  
Wei-Jhu Wang ◽  
Chia-Wen Chen ◽  
Kuo-Liang Lin
Keyword(s):  
Wear Resistance ◽  
Sewage Sludge ◽  
Water Absorption ◽  
Ceramic Tile ◽  
Bending Strength ◽  
Bottom Ash ◽  
Waste Materials ◽  
Sewage Sludge Ash ◽  
Kiln Temperature ◽  
Sludge Ash

Municipal incinerator bottom ash (MIBA) and sewage sludge ash (SSA) are secondary wastes produced from municipal incinerators. Landfills, disposal at sea, and agricultural use have been the major outlets for these secondary wastes. As global emphasis on sustainability arises, many have called for an increasing reuse of waste materials as valuable resources. In this study, MIBA and SSA were mixed with clay for ceramic tile manufacturing in this study. Raw materials firstly went through TCLP (Toxicity Characteristic Leaching Procedure) to ensure their feasibility for reuse. From scanning electron microscopy (SEM), clay’s smooth surface was contrasted with the porous surface of MIBA and SSA, which led to a higher water requirement for the mixing. Specimens with five MIBA mix percentages of 0%, 5%, 10%, 15%, and 20% (wt) and three SSA mix percentages of 0%, 10%, and 20% (wt) were made to compare how the two waste materials affected the quality of the final product and to what extent. Shrinkage tests showed that MIBA and SSA contributed oppositely to tile shrinkage, as more MIBA reduced tile shrinkage, while more SSA encouraged tile shrinkage. However, as the kiln temperature reached 1150 °C, the SiO2-rich SSA adversely reduced the shrinkage due to the glass phase that formed to expand the tile instead. Both MIBA and SSA increased water tile absorption and reduced its bending strength and wear resistance. Increasing the kiln temperature could effectively improve the water absorption, bending strength, and wear resistance of high MIBA and SSA mixes, as SEM showed a more compact structure at higher temperatures. However, when the temperature reached 1100 °C, more pores appeared and seemingly exhausted the benefit brought by the higher temperature. Complex interactions between kiln temperature and MIBA/SSA mix percentage bring unpredictable performance of tile shrinkage, bending strength, and water absorption, which makes it very challenging to create a sample meeting all the specification requirements. We conclude that a mix with up to 20% of SSA and 5% of MIBA could result in quality tiles meeting the requirements for interior or exterior flooring applications when the kiln temperature is carefully controlled.

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