scholarly journals Effect of Incorporating Nanoporous Metal Phosphate Materials on the Compressive Strength of Portland Cement

2008 ◽  
Vol 2008 ◽  
pp. 1-4
Author(s):  
Dawn M. Wellman ◽  
Kent E. Parker ◽  
Shas V. Mattigod ◽  
Glen E. Fryxell
Keyword(s):  
Compressive Strength ◽  
Low Cost ◽  
Physical And Mechanical Properties ◽  
Metal Phosphate ◽  
Waste Streams ◽  
Nanoporous Metal ◽  
Additional Water ◽  
Cadmium And Lead ◽  
Cement Formulation

Nanoporous metal phosphate (NP-MPO) materials are being developed for removal of contaminant oxyanions (As(OH), , and ), and cations (mercury, cadmium, and lead) from water and waste streams. Following sequestration, incorporation of metal laden NP-MPOs as a portion of cement formulation would provide an efficient and low-cost way to immobilize metal laden NP-MPOs in an easily handled waste form suitable for permanent disposal. There are no known investigations regarding the incorporation of NP-MPOs in concrete and the effects imparted on the physical and mechanical properties of concrete. Results of this investigation demonstrated that incorporating of NP-MPO materials requires additional water in the concrete formulation which decreases the compressive strength. Thus, incorporation of NP-MPOs in concrete may not serve as an efficient means for long-term disposal.

Llw Solidification Incement -Effect of Dilution

1994 ◽  
Vol 370 ◽  
Author(s):  
A. Katz ◽  
A.R. Brough ◽  
T. Bakharev ◽  
R.J. Kirkpatrick ◽  
L.J. Struble ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Heat Evolution ◽  
Early Age ◽  
Porous System ◽  
High Dilution ◽  
Solid Ratio ◽  
Additional Water ◽  
Lower Heat ◽  
High Concentrations

AbstractA simulated Low Level nuclear Waste (LLW) solution was tested for long term solidification in a cement-based matrix. The waste is characterized by high pH and high concentrations of sodium, aluminum, nitrate, nitrite, phosphate and carbonate. The effect of diluting the waste with additional water was studied. The cementitious matrix was composed of cement, fly-ash and clay (21°, 68° and 11° respectively) with high solution to solid ratio (1 liter / 1 kg.). Mixes were prepared at 45°C and cured at 90°C for 28 days.Maximum 28 day compressive strengths and early age heat evolution were achieved by diluting the LLW solution to approximately 67& of its original concentration. More dilution led to a lower heat evolution and compressive strength. No dilution was found to give lower compressive strength, and a heat evolution that was delayed, and lower in intensity. XRD spectra showed formation of zeolites and tobermorite at the higher concentrations (67, 85, and 100& of the concentration of the undiluted simulated LLW), with a change from Na-P1 zeolite for 67& of the undiluted concentration to a sodalite at 100&. SEM observations showed a porous system for the low and high dilution rates but a less porous one for an intermediate level of dilution.

Improvement of Compressive Strength of Soil by Using Jute Fiber Waste

2017 ◽  
Vol 751 ◽  
pp. 785-789
Author(s):  
Tahmina Sultana ◽  
Md. Bayezid Islam ◽  
Md. Waliur Rahman
Keyword(s):  
Compressive Strength ◽  
Low Cost ◽  
Point Of View ◽  
Soil Reinforcement ◽  
Jute Fiber ◽  
Coastal Zones ◽  
Long Term Effect ◽  
Ucs Test ◽  
Jute Waste

To attain the desirable strength of soil, soil reinforcement has been playing a pivotal role for many decades. Although there are many well-established methods to reinforce the soil, but now-a-days people are looking for low-cost reinforcing materials. In Bangladesh jute waste is not being used effectively, although jute production is quite good in amount. From this point of view in this study, jute fiber is selected as reinforcing material and focused on improvement of compressive strength of soil. Varying proportions of Jute fiber as 1%, 2%, 3% and 4% have been mixed with dry soil to make the samples to be tested. The result indicated that the sample prepared with 3% of jute fiber gives the highest value in Unconfined Compressive Strength (UCS) test and adding more than 3% of jute fiber tends to decrease the UCS value. As this study has been done keeping in mind about the embankment construction process in the coastal zones of Bangladesh, where grass turfing is done to protect soil from erosion and inorganic fertilizer is used to grow up the grass which has long-term effect on the environment. On the other hand, jute is 100% biodegradable, when it comes to contact of moist soil, after a certain period it acts as the natural fertilizer that helps to grow up the grass and make the root of grass stronger to hold the soil.

Utilization of Mosaic Sludge Waste into Fired Clay Brick: Properties and Leachability

2014 ◽  
Vol 1025-1026 ◽  
pp. 117-121
Author(s):  
Aeslina binti Abdul Kadir ◽  
Ahmad Shayuti Bin Abdul Rahim ◽  
Hidra Hasbee Bin Jamil
Keyword(s):  
Heavy Metals ◽  
Compressive Strength ◽  
Initial Rate ◽  
Low Cost ◽  
Physical And Mechanical Properties ◽  
Shrinkage Porosity ◽  
Clay Brick ◽  
Clay Bricks ◽  
Positive Effects ◽  
Sludge Waste

Brick is one of the most common masonry units used as building material. Due to the demand, different types of waste have been investigated to be incorporated into the bricks. Many types of sludge have been incorporated in fired clay brick for an example marble sludge, stone sludge, water sludge, sewage sludge and ceramic sludge. The utilization of these waste materials in fired clay bricks usually has positive effects on the properties such as lightweight bricks with improved shrinkage, porosity, and strength. Therefore, the objective of this study is to incorporate different percentages of mosaic sludge and investigate heavy metals leachability from the mosaic sludge brick. Heavy metals leachability was conducted by using toxicity characteristic leaching procedure (TCLP). Physical and mechanical properties were also determined which are compressive strength, shrinkage, density and initial rate of suction. From the results obtained, it shows that fired clay brick with 5% of mosaic sludge obtained the best result with highest compressive strength and low initial rate of suction (18.76N/mm2 and 10.08 g/mm2) respectively. Nevertheless, all the other properties for all bricks incorporated with different percentages of mosaic sludge were also complied with the BS 3921:1985 standard. The results also demonstrated that the leachability of potential heavy metals in mosaic brick were complied with USEPA (1996) and EPAV (2005a) regulatory limit. In conclusion, mosaic sludge could be an alternative low cost material for fired clay brick as well as providing a disposal method for mosaic sludge waste.

The Utilization of Coconut Fibre into Fired Clay Brick

2016 ◽  
Vol 673 ◽  
pp. 213-222 ◽  
Author(s):  
Aeslina Abdul Kadir ◽  
Siti Noorhajar Mohd Zulkifly ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Noor Amira Sarani
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Low Cost ◽  
Physical And Mechanical Properties ◽  
Firing Process ◽  
Dry Density ◽  
Clay Brick ◽  
Gas Emissions ◽  
Clay Bricks ◽  
Coconut Fibre

Over the year, agricultural establishment produced many types of waste in its daily operation. Coconut fibre for example is one of the most abundant agricultural wastes produced in Malaysia. Despite the massive amount of the waste produced, the standards of waste management in Malaysia are still poor. The main purpose of this study is to focus on the potential of coconut fibre utilization into fired clay bricks. The objectives of this study are to determine the characteristics of coconut fibre, to identify the gas emissions during firing process from coconut fibre brick and to investigate the physical and mechanical properties of from coconut fibre (1%, 3% and 5%) incorporation into fired clay brick. All the bricks were fired in a furnace up to 1050°C at 1°C/min. The gas emissions that were measured are carbon monoxide (CO), carbon dioxide (CO2) and sulphur dioxide (SO2). Based on the three gases, the results showed that CO2 is the highest gas emission produced during the firing process. Physical and mechanical properties tested are total shrinkage, dry density and compressive strength. Results found that by adding different percentages of coconut fibre, most of the properties were complied with the standards except for the compressive strength of 5% of coconut fibre in clay brick. Therefore, the utilization of coconut fibre could be one of the alternative disposal methods for agriculture waste and it will also provide low-cost material for brick that produce adequate physical and mechanical properties.

Physical and Mechanical Properties of Fired Clay Brick Incorporating with Mosaic Sludge Waste

2014 ◽  
Vol 803 ◽  
pp. 203-208 ◽  
Author(s):  
A.S. Abdul Rahim ◽  
Aeslina binti Abdul Kadir
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Initial Rate ◽  
Low Cost ◽  
Physical And Mechanical Properties ◽  
Shrinkage Porosity ◽  
Clay Brick ◽  
Clay Bricks ◽  
Positive Effects ◽  
Sludge Waste

Brick is one of the most common masonry units used as building material. Due to the demand, different types of waste have been investigated to be incorporated into the bricks. Many types of sludge have been incorporated in fired clay brick for example marble sludge, stone sludge, water sludge, sewage sludge, and ceramic sludge. The utilisation of these waste materials in fired clay bricks usually has positive effects on the properties such as lightweight bricks with improved shrinkage, porosity, and strength. Therefore, this study focus on the incorporation of mosaic sludge into fired clay brick. Physical and mechanical properties were conducted such as compressive strength, shrinkage, density and initial rate of suction test. From the results, it shows that brick with 5% of mosaic sludge obtained the best result with highest compressive strength and low initial rate of suction (18.76N/mm2 and 10.08 g/mm2) respectively. Nevertheless, all the other properties for all bricks incorporated with different percentages of mosaic sludge were complied with the standard. In conclusion, mosaic sludge could be an alternative low cost material for brick and at the same time provide a disposal method for mosaic sludge waste.

Carbon nanotubes and superplasticizer reinforcing cementitious composite for aerostatic porous bearing

2017 ◽  
Vol 231 (11) ◽  
pp. 1397-1407 ◽  
Author(s):  
Leandro J da Silva ◽  
Tulio H Panzera ◽  
Luciano MG Vieira ◽  
Jaime G Duduch ◽  
Christopher R Bowen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Compressive Strength ◽  
Carbon Nanotube ◽  
Low Cost ◽  
Physical And Mechanical Properties ◽  
Cementitious Composites ◽  
Cementitious Composite ◽  
Thrust Bearings ◽  
Porous Bearing

Cementitious composites are low cost and readily manufactured materials which can be used for specialist applications such as the production of aerostatic porous bearings. A design of experiment was used to identify the effects of superplasticizer additions and carbon nanotube inclusions on the physical and mechanical properties of cementitious composites which can be applied as porous restrictor in aerostatic thrust bearings. The presence of carbon nanotubes was able to increase the bulk density, the compressive strength and the modulus of elasticity, and also decrease the apparent porosity of the composites. The composite made with 0.4 wt.% of superplasticizer and 0.05 wt.% of carbon nanotubes achieved acceptable properties for the use as double-layered porous restrictor in aerostatic thrust bearings.

Fine Particle Mass Monitoring with Low-Cost Sensors: Corrections and Long-Term Performance Evaluation

2019 ◽  
Author(s):  
Carl Malings ◽  
Rebecca Tanzer ◽  
Aliaksei Hauryliuk ◽  
Provat K. Saha ◽  
Allen L. Robinson ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Fine Particle ◽  
Low Cost ◽  
Particle Mass ◽  
Long Term Performance ◽  
Term Performance

PEMANFAATAN KAYU AKASIA MANGIUM (Acacia mangium Willd) UNTUK MEBEL

2012 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Djoko Purwanto
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Physical Properties ◽  
Treatment Process ◽  
Acacia Mangium ◽  
Physical And Mechanical Properties ◽  
Wood Fibers ◽  
Test Parameters ◽  
Mechanical And Physical Properties ◽  
Scale Scores

Timber Acacia mangium (Acacia mangium, Willd) for Furniture. The study aims to determine the mechanical and physical properties and the decorative value (color and fiber) wood of acacia mangium with using finishing materials. This type of finishing material used is ultran lasur natural dof ,ultran lasur classic teak, aqua politur clear dof, aqua politur akasia dan aqua politur cherry. After finishing the wood is stored for 3 months. Test parameters were observed, namely, physical and mechanical properties of wood, adhesion of finishing materials, color and appearance of the fiber, and timber dimensions expansion. The results showed that the mechanical physical properties of acacia wood qualified SNI. 01-0608-89 about the physical and mechanical properties of wood for furniture, air dry the moisture content from 13.78 to 14.89%, flexural strength from 509.25 to 680.50 kg/cm2, and compressive strength parallel to fiber 342.1 - 412.9 kg/cm2. Finishing the treatment process using five types of finishing materials can increase the decorative value (color and fiber) wood. Before finishing the process of acacia mangium wood has the appearance of colors and fibers and less attractive (scale scores 2-3), after finishing acacia wood fibers have the appearance of colors and interesting and very interesting (scale 4-5).Keywords: mangium wood, mechanical properties, decorative value, finishing, furniture.

KUBOTA KNC-03

Alloy Digest ◽  
2010 ◽  
Vol 59 (1) ◽  
Keyword(s):  
Compressive Strength ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Strength ◽  
Temperature Performance ◽  
Resistance To Oxidation

Abstract Kubota KNC-03 is a grade with a combination of high strength and excellent resistance to oxidation. These properties make this alloy suitable for long-term service at temperature up to 1250 deg C (2282 deg F). This datasheet provides information on physical properties, hardness, elasticity, tensile properties, and compressive strength as well as creep. It also includes information on high temperature performance as well as casting and joining. Filing Code: Ni-676. Producer or source: Kubota Metal Corporation, Fahramet Division. See also Alloy Digest Ni-662, April 2008.

Surface Modification of Poly(Vinylchloride) for Manufacturing Advanced Catheters

2020 ◽  
Vol 27 (10) ◽  
pp. 1616-1633 ◽  
Author(s):  
Oana Cristina Duta ◽  
Aurel Mihail Ţîţu ◽  
Alexandru Marin ◽  
Anton Ficai ◽  
Denisa Ficai ◽  
...  
Keyword(s):  
Surface Modification ◽  
Chemical Modification ◽  
Medical Devices ◽  
Low Cost ◽  
Physical And Mechanical Properties ◽  
Polymeric Materials ◽  
Modern Medicine ◽  
Structural Failure ◽  
Chemical Grafting ◽  
One Step

Polymeric materials, due to their excellent physicochemical properties and versatility found applicability in multiples areas, including biomaterials used in tissue regeneration, prosthetics (hip, artificial valves), medical devices, controlled drug delivery systems, etc. Medical devices and their applications are very important in modern medicine and the need to develop new materials with improved properties or to improve the existent materials is increasing every day. Numerous reasearches are activated in this domain in order to obtain materials/surfaces that does not have drawbacks such as structural failure, calcifications, infections or thrombosis. One of the most used material is poly(vinylchloride) (PVC) due to its unique properties, availability and low cost. The most common method used for obtaining tubular devices that meet the requirements of medical use is the surface modification of polymers without changing their physical and mechanical properties, in bulk. PVC is a hydrophobic polymer and therefore many research studies were conducted in order to increase the hydrophilicity of the surface by chemical modification in order to improve biocompatibility, to enhance wettability, reduce friction or to make lubricious or antimicrobial coatings. Surface modification of PVC can be achieved by several strategies, in only one step or, in some cases, in two or more steps by applying several techniques consecutively to obtain the desired modification / performances. The most common processes used for modifying the surface of PVC devices are: plasma treatment, corona discharge, chemical grafting, electric discharge, vapour deposition of metals, flame treatment, direct chemical modification (oxidation, hydrolysis, etc.) or even some physical modification of the roughness of the surface.

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