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

2012 ◽  
Vol 626 ◽  
pp. 376-380 ◽  
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.

The Evaluation of High Calcium Green Polymeric Concrete

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.

scholarly journals Partial Replacement of Cement with Waste Paper Sludge Ash

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.

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

2014 ◽  
Vol 803 ◽  
pp. 88-92 ◽  
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.

The Effect of NaOH Concentration and Curing Condition to the Strength and Shrinkage Performance of Recycled Geopolymer Concrete

2014 ◽  
Vol 803 ◽  
pp. 194-200 ◽  
Author(s):  
Ahmad Ruslan Mohd Ridzuan ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Mohd Fadzil Arshad ◽  
Muhammad Faheem Mohd Tahir ◽  
A.A. Khairulniza
Keyword(s):  
Portland Cement ◽  
Sodium Hydroxide ◽  
Waste Paper ◽  
Paper Sludge ◽  
Concrete Aggregate ◽  
Geopolymer Concrete ◽  
Recycle Concrete Aggregate ◽  
Paper Sludge Ash ◽  
Curing Condition ◽  
Sludge Ash

Concrete is widely used as a material construction. Globally, the consumption of concrete was estimated to be more than 8 billion tons per year. Nowadays, many problems arise related to concrete manufacturing occur especially on environmental issues. A key concern for environmentalists has always been climate change. One of the ways to mitigate the impact activities on the climate is to reduce carbon footprint. Portland cement are commonly been used in concrete is responsible for about 5% of all CO2emission. It is reported by Davidovit that the production of one ton of Portland cement emits approximately one ton of CO2into the atmosphere. There are several ways to reduce environmental pollution that cause by production and utilization of Portland cement, one of it is Geopolymer concrete. Subsequently Geopolymer concrete incorporating with recycle concrete aggregate (RCA) is one of the alternative to further reduce carbon footprint and as well as can reduce waste. Geopolymer concrete is a concrete that use no cement and produced by the combination of alkaline activator and supplementary cementitious material (SCM) such as fly ash, boiler ash, waste paper sludge ash (WPSA), ground granulated blast-furnace slag (GGBS), and so on in order to reduce carbon emission. In this study the Waste Paper Sludge Ash (WPSA) were used as a SCM and the combination of sodium hydroxide (NaOH) and sodium silicate (Na2SiO3) as a binder. Two (2) series of geopolymer concrete specimens comprising two (2) different molar of sodium hydroxide (NaOH) which are 8M and 14M were adopted. The effect variable alkaline molarity on the compressive strength and shrinkage of the geopolymer concrete specimens is tested at the age of 3, 7, 14 and 28 days. The mixture of geopolymer concete with 8M of sodium hydroxide (NaOH) concentration then was categorized into three (3) groups. Each group were been cured at different curing condition which are in ambient condition, oven, and external condition. The size of specimens prepared were 100mm x 100mm x100mm. The result shows that the molarities of sodium hydroxide (NaOH) influenced the strength of Waste Paper Sludge Ash (WPSA) based geopolymer concrete produced incorporating with increasing of recycle concrete aggregate (RCA). The result also show that the geopolymer concrete undergoes very low shrinkage. Curing condition will also effect the strength of geopolymer concrete produced.

EFFECT OF RECYCLED CONCRETE AGGREGATE QUALITY ON PROPERTIES OF CONCRETE

2020 ◽  
Vol 15 (2) ◽  
pp. 57-69
Author(s):  
Daniel Hatungimana ◽  
Şemsi Yazıcı ◽  
Ali Mardani-Aghabaglou
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Water Absorption ◽  
Recycled Concrete ◽  
Recycled Aggregates ◽  
Concrete Aggregate ◽  
Hardened Concrete ◽  
Recycled Concrete Aggregate ◽  
Waste Concrete ◽  
Concrete Production

ABSTRACT The possibility of the use of recycled aggregates from the construction industry in green concrete production is of increasing importance to reduce the negative environmental impact associated with construction and demolition wastes. The objective of this study is to investigate the effect of recycled concrete aggregate (RCA) quality on the properties of hardened concrete properties such as compressive strength, splitting tensile strength, density, water absorption capacity and porosity accessible to water. The RCA used in this study was obtained from the crushing of waste concrete with two different compressive strengths (LRCA obtained from the crushing of waste concrete having compressive strengths below 30 MPa and HRCA obtained from the crushing of waste concrete having compressive strengths above 30 MPa). The natural coarse limestone aggregate was 100% replaced with coarse LRCA and HRCA. As a result of the study, the use of 100% HRCA and %100 LRCA instead of limestone coarse aggregate in the concrete adversely affected its mechanical and physical properties. In addition, HRCA showed better performance in terms of compressive strength, tensile strength, water absorption and porosity compared to the use of LRCA. Furthermore, the percentage of adhered mortar on the surface of LRCA and HRCA was analyzed using a computerized micro tomography device, and it was found that the percentages of attached mortar and aggregates are 61% and 35.5% for LRCA, whilst the attached mortar and aggregate contents for HRCA are 45.9% and 53.7%, respectively.

scholarly journals Compressive strength improvement for recycled concrete aggregate

2018 ◽  
Vol 162 ◽  
pp. 02018 ◽  
Author(s):  
Dhiyaa Mohammed ◽  
Sameh Tobeia ◽  
Faris Mohammed ◽  
Sarah Hasan
Keyword(s):  
Compressive Strength ◽  
Silica Fume ◽  
Recycled Concrete ◽  
Recycled Aggregate ◽  
Concrete Aggregate ◽  
Strength Increase ◽  
Recycled Concrete Aggregate ◽  
Concrete Compressive Strength ◽  
Concrete Production ◽  
Long Time

Increasing amount of construction waste and, concrete remnants, in particular pose a serious problem. Concrete waste exist in large amounts, do not decay and need long time for disintegration. Therefore, in this work old demolished concrete is crashed and recycled to produce recycled concrete aggregate which can be reused in new concrete production. The effect of using recycled aggregate on concrete compressive strength has been experimentally investigated; silica fume admixture also is used to improve recycled concrete aggregate compressive strength. The main parameters in this study are recycled aggregate and silica fume admixture. The percent of recycled aggregate ranged from (0-100) %. While the silica fume ranged from (0-10) %. The experimental results show that the average concrete compressive strength decreases from 30.85 MPa to 17.58 MPa when the recycled aggregate percentage increased from 0% to 100%. While, when silica fume is used the concrete compressive strength increase again to 29.2 MPa for samples with 100% of recycled aggregate.

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

2012 ◽  
Vol 501 ◽  
pp. 34-38 ◽  
Author(s):  
Kar Keng Lim ◽  
Roslinda Shamsudin ◽  
Muhammad Azmi Abdul Hamid
Keyword(s):  
Compressive Strength ◽  
Construction Material ◽  
Paper Industry ◽  
Pulp And Paper Industry ◽  
Paper Sludge ◽  
Mixed Powder ◽  
Plaster Of Paris ◽  
Paper Sludge Ash ◽  
Sludge Ash ◽  
Cylindrical Samples

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.

Sign in / Sign up

Export Citation Format

Share Document