scholarly journals Exploring the Properties of Mortar Containing Incineration Fly Ash

2021 ◽  
Vol 920 (1) ◽  
pp. 012041
Author(s):  
N M Ibrahim ◽  
R Abdul Malek ◽  
N L Rahim ◽  
M Abdul Rahim ◽  
R Che Amat ◽  
...  
Keyword(s):  
Fly Ash ◽  
Water Absorption ◽  
Physical And Mechanical Properties ◽  
Pulse Velocity ◽  
Hazardous Substances ◽  
Partial Replacement ◽  
Absorption Test ◽  
Environmental Destruction ◽  
Water Absorption Test ◽  
Potential Use

Abstract Fly Ash (FA) is one of the waste materials generated from the combustion of solid waste through incinerator and contains hazardous substances. Further treatment to the ash needs to be done to avoid further environmental destruction. As an alternative solution for this problem, FA is used as a replacement material for cement in the mortar. The main objective of this study is to explore the potential use of FA as partial replacement of cement in mortar. The percentage of FA used to replace the cement in this study is 0%, 5%, 10%, 15% and 20%. Several important tests were conducted to identify main properties of the mortar such as compressive strength, water absorption, density and ultra-pulse velocity. Mortar containing 15% of fly ash has the highest of compression strength which is 35 MPa after 28 days. Besides, the mortar containing 5% of fly ash has the highest result of water absorption test and density test whereas mortar containing 20% of fly ash has the highest value for pulse velocity after 28 days. Thus, mortar containing fly ash has good physical and mechanical properties.

scholarly journals REDUCTION OF CEMENT CONSUMPTION BY THE AID OF SILICA NANO-PARTICLES (INVESTIGATION ON CONCRETE PROPERTIES)

2012 ◽  
Vol 18 (3) ◽  
pp. 416-425 ◽  
Author(s):  
Hadi Bahadori ◽  
Payam Hosseini
Keyword(s):  
Tensile Strength ◽  
Water Absorption ◽  
Physical And Mechanical Properties ◽  
Strength Loss ◽  
Experimental Results ◽  
Nano Particles ◽  
Hardened Concrete ◽  
Absorption Test ◽  
Concrete Properties ◽  
Water Absorption Test

In this study, effects of replacing cement with colloidal amorphous silica nano-particles have been experimentally investigated on the physical and mechanical properties, durability and microstructure of concrete. Experimental results include workability, fresh concrete density, and hardened concrete properties like compressive strength at different ages of 3, 7, and 28-days, and also 28-days splitting tensile strength. Furthermore, influence of silica nano-particles on durability and microstructure of concrete for 28-days specimens was tested by conducting water absorption test, Scanning Electron Microscopy (SEM), and Energy Dispersive X-ray Analysis (EDAX), respectively. In order to study the effect of replacement of cement with silica nano-particles, specimens with 10%, 20%, and 30% cement reduction, and addition of 1%, 2%, and 3% silica nano-particles with respect to witness specimen were fabricated. Experimental results revealed that 20% reduction of cement combining 2% silica nano-particles and also 10% cement reduction combined with 1% silica nano-particles enhance the microstructure of concrete, despite unnoticeable compressive and tensile strength loss. By remarkable reduction of cement consumption and addition of silica nano-particles, strength almost remains constant and consequently decreasing the cement content will become possible. Also, in all specimens, increase in nano-particles content and decrease in cement usage contributed to workability loss. Therefore, applying super-plasticizers seems indispensible while using silica nano-particles. On the other side, according to water absorption test, concretes containing nanoparticles showed more appropriate durability.

The Usage of Glass Waste as Cement Replacement

2016 ◽  
Vol 673 ◽  
pp. 95-104 ◽  
Author(s):  
Aeslina Abdul Kadir ◽  
Mohamad Rosli Ismail ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Noor Amira Sarani ◽  
Mohd Ikhmal Haqeem Hassan
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Glass Powder ◽  
Physical And Mechanical Properties ◽  
Concrete Mixture ◽  
Powder Size ◽  
Absorption Test ◽  
Glass Waste ◽  
Water Absorption Test ◽  
Growth Production

The growth production and manufactured sector in Malaysia had led to increase the industrial by-product waste especially glass. These growing problems of glass waste can be reduced if new disposal method are utilized other than disposed it to the landfill. This study is focused on the utilization of glass waste with cement. The main objectives of this study are to determine the characteristics of glass waste and to conduct physical and mechanical properties test towards the concrete with different percentages of glass (10%, 20% and 30%). Samples of glass waste were collected and crushed to the powder size (40µm) before being mix in concrete mixture and their characteristics were determined by using X-Ray Fluorescent (XRF). Physical and mechanical properties include compressive strength, water absorption and density were tested. The results obtained demonstrated that, only sample with 10% of glass powder incorporated is complied with the minimum strength of the cube with 25.6MPa. However, all of the samples meet the minimum value for density and water absorption test. The density obtained is still in the range which is between 2116.1kg/m3 until 2239.4kg/m3. As for water absorption test, all of the samples obtained the value below than 6% and can be classified as a good concrete. As a conclusion, 10% of glass powder is the most suitable percentage to be incorporated into concrete mixture. This replacement could be an alternative disposal method to glass waste.

Physical and Mechanical Properties of Cement Paste Were Used Partially with Fly Ash and Kaolin Waste

2017 ◽  
Vol 866 ◽  
pp. 199-203
Author(s):  
Chidchanok Chainej ◽  
Suparut Narksitipan ◽  
Nittaya Jaitanong
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Room Temperature ◽  
Physical And Mechanical Properties ◽  
Partial Replacement ◽  
X Ray Diffraction ◽  
X Ray ◽  
Lime Water ◽  
Diffraction Patterns ◽  
Iron Mold

The aims of this research were study the microstructures and mechanical properties for partial replacement of cement with Fly ash (FA) and kaolin waste (KW). Ordinary Portland cement were partially replaced with FA and KW in the range of 25-35% and 10-25% by weight of cement powder. The kaolin waste was ground for 180 minutes before using. The specimen was packing into an iron mold which sample size of 5×5×5 cm3. Then, the specimens were kept at room temperature for 24 hours and were moist cured in the incubation lime water bath at age of 3 days. After that the specimens were dry cured with plastic wrap at age of 3, 7, 14 and 28 days. After that the compounds were examined by x-ray diffraction patterns (XRD) and the microstructures were examined by scanning electron microscopy (SEM). The compressive strength was then investigated.

scholarly journals CHARACTERISTICS OF PHYSICAL PROPERTIES OF WOOD POWDER COMPOSITES AND BAGASSEAS CONSTRUCTION MATERIALS OF SHIP

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Ersti Yulika Sari ◽  
Polaris Nasution ◽  
Fajri Ramdhan1
Keyword(s):  
Physical Properties ◽  
Water Absorption ◽  
Construction Materials ◽  
Absorption Test ◽  
Wood Powder ◽  
Powder Composites ◽  
Density Values ◽  
Water Absorption Test ◽  
Composite Wood

Parameters for measuring the physical properties on this research are divided into three elements, including measurement of weight, water absorption, and density. This research was conducted from January to March 2018 to determine the physical properties of wood powder composites and bagasse. The manufacturing and testing process refers to the ASTM and JIS standards. Weight and density testing refer to the ASTM D 792 standard while the water absorption test refers to the JIS A5908 standard. The results showed that the density of wood powder was 0.4175 gr / cm3, and the bagasse was 0.3125 gr / cm3. Then, fiber absorption in units of volume to water and resin were 16.88% and 13.75% respectively. The results showed that the largest water absorption was found in composite wood powder 60% and bagasse 40%, which was 13.47%, and for the highest density values found in wood powder composites as much as 80% or 1,078.29 kg / m3

Studies on Tensile and Water Absorption Properties on Kenaf (Hibiscus Cannabinus) Fibre Mat/Polyester Composite Using Chemical Treatment

2013 ◽  
Vol 421 ◽  
pp. 290-295
Author(s):  
Mohammad Taib Mohamad Nurul Azman ◽  
Abu Kassim Masitah ◽  
Ariff Jamaludin Mohd ◽  
Ismail Tayibbah
Keyword(s):  
Water Absorption ◽  
Treatment Duration ◽  
Hibiscus Cannabinus ◽  
Absorption Test ◽  
Duration Of Treatment ◽  
Absorption Properties ◽  
Kenaf Fibre ◽  
Polyester Composite ◽  
Water Absorption Test ◽  
Polyester Composites

This research investigated the tensile and water absorption properties of kenaf fibre mat/polyester composites. Treatment using acetylation method has been introduced to improve the properties of product manufactured. The effects of acetylation treatment with three variations of time that were 1, 4 and 24 hours on the kenaf fibre mats were investigated. The MOE of the tensile of treated fibre mat/polyester composite for 1 hour was the highest with value 4589.61 MPa. The tensile strength of treated fibre mat/polyester composite for 4 hours was the highest with value 0.6213 MPa. For water absorption test, the results showed that fibre mat/polyester composite with treatment duration for 1 hour had the lowest water absorption that was 1.23% compared with treatment duration for 4 hours and 24 hours. For overall it can be concluded that the treatment duration of 1 hour was recommended for acetylation method when compared with 4 hours and 24 hours duration treatments. Using acetylation treatment on the kenaf fibre mat/polyester composites was showed improvement on composite and was recommended in short duration of treatment.

scholarly journals Thermal Action on Normal and High Strength Cement Mortars

2020 ◽  
Vol 10 (18) ◽  
pp. 6455
Author(s):  
Marianela Ripani ◽  
Hernán Xargay ◽  
Ignacio Iriarte ◽  
Kevin Bernardo ◽  
Antonio Caggiano ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Peak Load ◽  
Physical And Mechanical Properties ◽  
Thermal Action ◽  
High Strength ◽  
Strength Loss ◽  
Brittle Behavior ◽  
Cement Mortars ◽  
Water Absorption Test

High temperature effect on cement-based composites, such as concrete or mortars, represents one of the most important damaging process that may drastically affect the mechanical and durability characteristics of structures. In this paper, the results of an experimental campaign on cement mortars submitted to high temperatures are reported and discussed. Particularly, two mixtures (i.e., Normal (MNS) and High Strength Mortar (MHS)) having different water-to-binder ratios were designed and evaluated in order to investigate the incidence of both the mortar composition and the effects of thermal treatments on their physical and mechanical properties. Mortar specimens were thermally treated in an electrical furnace, being submitted to the action of temperatures ranging from 100 to 600 °C. After that and for each mortar quality and considered temperature, including the room temperature case of 20 °C, water absorption was measured by following a capillary water absorption test. Furthermore, uniaxial compression, splitting tensile and three-points bending tests were performed under residual conditions. A comparative analysis of the progressive damage caused by temperature on physical and mechanical properties of the considered mortars types is presented. On one hand, increasing temperatures produced increasing water absorption coefficients, evidencing the effect of thermal damages which may cause an increase in the mortars accessible porosity. However, under these circumstances, the internal porosity structure of lower w/b ratio mixtures results much more thermally-damaged than those of MNS. On the other hand, strengths suffered a progressive degradation due to temperature rises. While at low to medium temperatures, strength loss resulted similar for both mortar types, at higher temperature, MNS presented a relatively greater strength loss than that of MHS. The action of temperature also caused in all cases a decrease of Young’s Modulus and an increase in the strain corresponding to peak load. However, MHS showed a much more brittle behavior in comparison with that of MNS, for all temperature cases. Finally, the obtained results demonstrated that mortar quality cannot be neglected when the action of temperature is considered, being the final material performance dependent on the physical properties which, in turn, mainly depend on the mixture proportioning.

Effects of Deicing Salt Solutions on Physical Properties of Pavement Concretes

2012 ◽  
Vol 2290 (1) ◽  
pp. 69-75 ◽  
Author(s):  
Jitendra Jain ◽  
Jan Olek ◽  
Anna Janusz ◽  
Daria Jozwiak-Niedzwiedzka
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Physical And Mechanical Properties ◽  
Exposure Period ◽  
Relative Effect ◽  
Pulse Velocity ◽  
Ion Concentration ◽  
Portland Cement Concrete ◽  
Salt Solutions ◽  
Safe Driving

Salt solutions are used on pavement surfaces during wintry weather events to ensure safe driving conditions. In addition to sodium chloride (NaCl), which continues to be traditionally used as a deicer, solutions of calcium chloride (CaCl2) and magnesium chloride (MgCl2) are being increasingly used to provide a more consistent ice and snow control and thus ensure safe driving. This paper assesses the effects of three salt solutions (NaCl, CaCl2, and MgCl2) on several physical and mechanical properties of pavement concretes. These deicing solutions were used under simulated wetting–drying (W-D) and freezing–thawing (F-T) exposure regimes with total ion concentration of the deicers of 10.5 molal for W-D exposure and 5.5 molal for F-T exposure. Two types of concretes were used in the study: ordinary portland cement concrete and fly ash concrete, in which 20% (by mass) of cement was replaced by Class C fly ash. The physical changes of cylindrical specimens subjected to the W-D regime were monitored by ultrasonic pulse velocity measurements after every 2 weeks of exposure until the end of the test. At the end of the W-D exposure period, the same test cylinders were used to obtain the compressive strength of the concrete. The results of all measurements, combined with visual observations of the overall condition of the specimen, were used to assess the relative effect of deicers (and the exposure conditions) on both types of concretes. The overall findings from this research indicated that exposure to the CaCl2 deicer resulted, in general, in more severe changes in the physical and mechanical properties of both types of concrete used in this study.

Experimental Study on Sustainable Concrete with the Mixture of Low Calcium Fly Ash and Lime as a Partial Replacement of Cement

2011 ◽  
Vol 250-253 ◽  
pp. 307-312 ◽  
Author(s):  
Muthuramalingam Jayakumar ◽  
M. Salman Abdullahi
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Water Absorption ◽  
Chloride Ion ◽  
Apparent Volume ◽  
Partial Replacement ◽  
Fly Ash Concrete ◽  
Low Calcium ◽  
Chloride Ion Penetration ◽  
Ion Penetration

Even though the use of fly ash in concrete is nowadays a common practice, its relatively slow pozzolanic reactivity hinders its greater utilization; hence efficient methods of activation are on demand. This study was carried out to evaluate the influence of lime as a chemical activator on the mechanical and durability properties of high strength fly ash concrete. Mixtures were made with 0, 30, 40, and 50% of cement replaced by low calcium fly ash. Corresponding mixtures were also made with the same amount of fly ash and addition of 10% of lime to each mixture. For each concrete mixture, slump, compressive strength, water absorption, sorptivity, apparent volume of permeable voids, and resistance to chloride-ion penetration were measured. The results obtained showed that addition of lime improved the compressive strength significantly at all ages. The strength of all the fly ash mixtures containing lime surpassed that of the corresponding Portland cement mix at 60 days. Addition of lime also improved the sorptivity and resistance to chloride-ion penetration of the fly ash concrete. It however increases the water absorption and the volume of permeable voids of the fly ash concrete.

Sign in / Sign up

Export Citation Format

Share Document