Effect of Paper Sludge Ash on the Compressive Strength of Plaster of Paris/Paper Sludge Ash Composites

In this study, paper sludge ash, a waste from pulp and paper industry was used as a filler in fabricating Plaster of Paris/paper sludge ash composites. Various percentage of paper sludge ash was used, namely 1wt.%, 3wt.%, 5wt.% and 7wt.%. The effect of paper sludge ash on the compressive strength of the Plaster of Paris was studied. The mixed powder of paper sludge ash and Plaster of Paris were form into a 6 mm diameter and 12 mm height cylindrical samples. The composites were characterized theirs density where it shows that the density decreased as the amount of paper sludge ash increased. The compressive strength of the composites also decreased from 11.67 MPa without paper sludge ash addition to 0.50 MPa at 7wt.% paper sludge ash. However, the requirement of strength for Plaster of Paris in industry is between 8.96 MPa to 20.68 MPa. From the SEM observation, sample contain higher percentage of paper sludge ash exhibited more porosity. Therefore with the addition of 1wt.% of paper sludge ash into Plaster of Paris can be a promising construction material.

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Partial Replacement of Cement with Waste Paper Sludge Ash

International Journal for Research in Applied Science and Engineering Technology ◽

10.22214/ijraset.2021.39150 ◽

2021 ◽

Vol 9 (11) ◽

pp. 1975-1983

Author(s):

Shahid Bashir

Keyword(s):

Tensile Strength ◽

Compressive Strength ◽

Water Absorption ◽

Cement Industry ◽

Waste Paper ◽

Partial Replacement ◽

Dry Density ◽

Paper Sludge ◽

Paper Sludge Ash ◽

Sludge Ash

Abstract: Cement production is one of the sources that emit carbon dioxide, in addition to deforestation and combustion of fossil fuels also leads to ill effects on environment. The global cement industry accounts for 7% of earth’s greenhouse gas emission. To enhance the environmental effects associated with cement manufacturing and to constantly deplore natural resources, we need to develop other binders to make the concrete industry sustainable. This work offers the option to use waste paper sludge ash as a partial replacement of cement for new concrete. In this study cement in partially replaced as 5%, 10%, 15% and 20% by waste paper sludge ash in concrete for M25 mix and tested for compressive strength, tensile strength, water absorption and dry density up to the age of 28days and compared it with conventional concrete, based on the results obtained, it is found that waste paper ash may be used as a cement replacement up to 5% by weight and the particle size is less the 90µm to prevent reduction in workability. Keywords: slump test, Compressive strength, split tensile strength, water absorption test, Waste Paper Sludge Ash Concrete, Workability.

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Effect of Alkaline Activators Concentration to the Strength and Morphological Properties of Wastepaper-Based Geopolymer Mortars

Materials Science Forum ◽

10.4028/www.scientific.net/msf.803.88 ◽

2014 ◽

Vol 803 ◽

pp. 88-92 ◽

Cited By ~ 2

Author(s):

A.R.M. Ridzuan ◽

A.A. Khairulniza ◽

M.A. Fadzil ◽

J. Nurliza

Keyword(s):

Compressive Strength ◽

Ambient Temperature ◽

Waste Paper ◽

Morphological Properties ◽

Composition Analysis ◽

Paper Sludge ◽

High Porosity ◽

X Ray ◽

Paper Sludge Ash ◽

Sludge Ash

Waste paper sludge ash (WPSA) is a byproduct that has potential to replace Ordinary Portland Cement (OPC) as a building material. The purpose of this study is to investigate the effect of NaOH concentration on the strength of Waste Paper Sludge Ash (WPSA)-based geopolymer mortar. Initially, the WPSA samples were been analyzed using X-ray Fluorescence (XRF) to determine the chemical composition. From the XRF analysis, the by-product WPSA containing higher amount of calcium, silica and alumina. Alkaline solution are from soluble sodium-based used in geopolymerization are combination of Sodium Hydroxide (NaOH) and Sodium Silicate (Na2SiO3). The mortars samples were cast with various concentration of NaOH and ratio of Na2SiO3 /NaOH which is 2.5. The specimens were carried out on size 50x50x50 mm cube and fresh mortar were been cured at 70 ̊c oven temperature and ambient temperature. The compressive strength tests were conducted after aging the specimen at 3, 7, 14, and 28 days. The results revealed that as the concentration of NaOH increased, the compressive strength of geopolymer mortar increases. However, the optimum NaOH concentration of geopolymer mortar is at 12M. More than 12M concentrations of NaOH were produced high porosity and decreasing the strength. Moreover, curing of fresh geopolymer mortar is performed mostly at an oven temperature compared to ambient temperature due to heat being a reaction accelerator. This paper also present on the morphology, and Energy dispersive x-Ray (EDX) composition analysis of WPSA based geopolymer mortar.

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Investigate the Effect of Paper Sludge Ash Addition on the Mechanical Properties of Granular Materials

Pollack Periodica ◽

10.1556/606.2020.15.3.8 ◽

2020 ◽

Vol 15 (3) ◽

pp. 79-90

Author(s):

Abbas Al-Hdabi ◽

Mohammed K. Fakhraldin ◽

Rasha A. Al-Fatlawy ◽

Tawfek Sheer Ali

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Granular Materials ◽

Elevated Temperatures ◽

California Bearing Ratio ◽

Paper Sludge ◽

Ratio Test ◽

Fluidized Bed Combustion ◽

Paper Sludge Ash ◽

Sludge Ash

Ignition of waste paper sludge at elevated temperatures to produce electricity in power generation plants utilizing fluidized bed combustion generates paper sludge ash. Due to the high concentration of lime and gelignite in paper sludge ash, it is expected that it will play a vital role as a cementitious material. This paper investigates the use of paper sludge ash to improve the mechanical properties of the granular materials, which are suitable to subbase course for road and building constructions. Also, a comparison study with the use of Portland cement as an additive to granular materials has been covered. The mechanical properties were evaluated by conducting the California bearing ratio test for the two adopted methods. Moreover, the compressive strength of the samples using paper sludge ash and cement are investigated. In accordance to the California bearing ratio test, 4% paper sludge ash was indicated as the optimum ash content at which the California bearing ratio value increased by 173% and 111% in comparison with untreated material and 6% cement, respectively. On the other hand, and by means of the compressive strength, the granular materials with 4% paper sludge ash has compressive strength higher than those with 6% cement.

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The Evaluation of High Calcium Green Polymeric Concrete

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.626.776 ◽

2012 ◽

Vol 626 ◽

pp. 776-780

Author(s):

Ahmad Ruslan Mohd Ridzuan ◽

A.A. Khairulniza ◽

M.A. Fadhil

Keyword(s):

Compressive Strength ◽

Chemical Properties ◽

Cement Industry ◽

Recycled Concrete ◽

Waste Paper ◽

Paper Sludge ◽

Concrete Aggregate ◽

High Calcium ◽

Paper Sludge Ash ◽

Sludge Ash

ncreasing environmental concerns of the cement industry brings about the requirement to the development of new binders. Polymeric concrete containing no cement provides great potential in reducing the global warming problems caused by CO2emissions in Portland cement production. On the other hand, large amount of waste paper sludge ash produced annually in Malaysia has caused a disposal problem as they require a proper dumping process whereby it is very costly. The study focuses on the utilization of this high calcium Waste paper sludge ash (WPSA) in polymeric concrete containing recycled concrete aggregate (RCA). WPSA is chemically activated by a high-alkaline solution to form paste that binds aggregate in the mixture. Sodium hydroxide and sodium silicate solution are used as alkali activators of silica (Si) and aluminium (Al) in main binders. The polymeric concrete samples were exposed to external ambient condition and tested for compressive strength and shrinkage at 3, 7, 28, 56, and 90 days to identify the strength and deformation of the polymeric concrete. X-Ray Fluorescence (XRF) analysis performed to ascertain the chemical properties of the produced WPSA. The result of polymeric concrete yielded very minimum shrinkage. The measurement compressive strength is up to 7MPa at 90 days. Hence, this new green material will bring benefits to the environment and is of economical value.

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Influence of Waste Paper Sludge Ash (WPSA) and Fine Recycled Concrete Aggregate (FRCA) on the Compressive Strength Characteristic of Foamed Concrete

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.626.376 ◽

2012 ◽

Vol 626 ◽

pp. 376-380 ◽

Cited By ~ 5

Author(s):

Siti Shahidah Sharipudin ◽

Ahmad Ruslan Mohd Ridzuan

Keyword(s):

Compressive Strength ◽

Recycled Concrete ◽

Waste Paper ◽

Paper Sludge ◽

Concrete Aggregate ◽

Recycled Concrete Aggregate ◽

Concrete Production ◽

Foamed Concrete ◽

Paper Sludge Ash ◽

Sludge Ash

In the effort to produce sustainable concrete, considerable attempt has been placed on replacing the main ingredients in concrete mixtures with more sustainable materials with the objective to reduce the carbon footprint. One of the replacement materials is waste paper sludge ash (WPSA), a local industrial by-product generated abundantly by newsprint mills which possesses considerable cementitious properties. Parallel to this, the high amount of construction waste, particularly concrete waste has become a difficult environmental issue to cope with in todays world. For this reason, recycling of concrete waste as a new alternative aggregate is being effectively utilized in concrete production. Thus, this paper reports on a study conducted to evaluate the compressive strength characteristics of the potential of using WPSA as a binder and fine recycled concrete aggregate (FRCA) as a virgin sand replacement in producing foamed concrete. The findings of this study exhibited that the inclusion of WPSA and FRCA for replacement ratios up to 20% and 15% respectively has significantly influenced the strength properties of foamed concrete.

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Evaluation on Compressive Strength of Concrete with Waste Paper Sludge Ash Aggregate (WPSAA)

International Conference on Green Buildings and Optimization Design (GBOD 2012) ◽

10.1115/1.860137_ch11 ◽

2012 ◽

pp. 79-90

Keyword(s):

Compressive Strength ◽

Waste Paper ◽

Paper Sludge ◽

Paper Sludge Ash ◽

Compressive Strength Of Concrete ◽

Sludge Ash

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Alkali-activated slag concrete with paper industry waste

Waste Management & Research ◽

10.1177/0734242x20983890 ◽

2021 ◽

Vol 39 (3) ◽

pp. 466-472

Author(s):

Maria Mavroulidou ◽

Shamil Shah

Keyword(s):

Paper Industry ◽

Steel Production ◽

Waste Materials ◽

Paper Sludge ◽

Activation Process ◽

Cement Concrete ◽

Paper Sludge Ash ◽

Sludge Ash ◽

Alkali Activated ◽

Alkali Activated Cement

Pulp and paper manufacturing and recycling industries are a resource-intensive sector, generating 25–40% of the annual municipal solid waste worldwide. Waste includes abundant volumes of paper sludge, as well as the product of its incineration, namely paper sludge ash. These two waste materials are both predominantly landfilled. There is thus a drive for additional valorisation routes for these materials. This short communication focuses on the potential use of paper sludge ash in alkali-activated cement concrete; this type of concrete was estimated to potentially reduce CO2 emissions by up to 5–6 times, while it can also incorporate waste materials or industrial by-products in its composition. The paper presents a laboratory study assessing the feasibility of structural alkali-activated cement concrete with ground granulated blastfurnace slag (a by-product of steel production) and paper sludge ash. Paper sludge ash is used mainly as a source of Ca(OH)2 in the alkaline activator solution, and secondly as an additional source of aluminosilicates. A number of factors potentially affecting the activation process and the resulting concrete quality were investigated, including different dosage of activators, curing conditions and curing time. Mixes with paper sludge ash in the activator system developed high early concrete strengths at ambient temperatures and maintained adequate strengths for structural concrete. Further mix optimisation and mechanical and durability testing, accompanied by material characterisation, are required to establish the advantages of using this waste material in structural alkali-activated cement concrete.

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