compressive strength and durability of concrete …,this study aims to investigate the effects of partially replacing cement with coconut shell ash (csa) in its compressive strength, sorptivity, and rsa. csa in this study was classified as a class n pozzolan, a cementitious material that makes a cheaper substitute for ordinary portland cement (opc)..use of coconut shell ash as aggregates,coconut shell may present itself as a potential material in the field of construction industries. the coconut shell is compatible with cement and no need to pre-treatment for using it as coarse aggregate. because of the smooth surface on one side of the shells concrete made with coconut shell presents better workability. coconut shell concrete shows good impact resistance. as compared to.
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coconut shell aggregate exhibits low impact, crushing, and abrasion values of 1.3%, 1.16% and 2.23% respectively compared with normal aggregate with 19.23%, 25.60% and 27.67% respectively. coconut shell, however, has high percentage of water absorption capacity, elongation index and flakiness index of 23.72%, 26.69% and 86.12% respectively compared with that of normal aggregate of 1.80%,
aggregate with coconut shell to produce lightweight concrete. coconut shell exhibits more resistance against crushing, impact and abrasion, compared to crushed granite aggregate. coconut shell can be grouped under lightweight aggregate. there is no need to treat the coconut shell before use as an aggregate except for water absorption.
steam activation is the most widely used process because it is generally used to activate both coconut shell and coal based carbons. steam activated carbons are produced in a two-stage process. firstly the raw material, in the form of lumps, pre sized material, briquettes or extrudates, is carbonized by heating in an inert atmosphere such as flue gas, so that dehydration and devolatilization
the good indicators of coconut shell quality as aggregate of concrete roof tiles are particles, shape and texture, resistance to crushing, absorption and surface moisture, and light-weight. 3. the compressive strength gained higher than the conventional concrete roof tiles after 7th days.
the results confirm that although there is an increase in cost due to additional cement requirement, the advantages being many, including efficient utilization of waste coconut shell, reduction in natural source depletion etc, the use of coconut shell in concrete seems to be a
workable concrete with satisfactory strength. integration of coconut shell enhanced the strength of concrete making it to be the highest as compared to conventional concrete mixture. keywords: coconut shells, construction materials, hollow blocks, recycled materials, technical specification
integration of coconut shell enhanced the strength of concrete making it to be the highest as compared to conventional concrete mixture.
concrete can be manufactured to the desired strength with an economy. the durability of concrete is very high. it can be cast to any desired shape. the casting of concrete can be done in the working site which makes it economical. the maintenance cost of concrete is almost negligible. the deterioration of concrete is not appreciable with age.
the addition of coconut-fibres significantly improved many of the engineering properties of the concrete, notably torsion, toughness and tensile strength. the ability to resist cracking and spalling were also enhanced. however, the addition of fibres adversely affected the compressive strength.
however, there are advantages and disadvantages associated with this material. for example, while concrete becomes stronger and more durable with time, it is susceptible to water and freezing temperatures, meaning that water can seep into cracks and cause damage to the concrete.
besides the advantages, there are some disadvantages of coconut fibre mattresses: 1. they are firm: if you are such a person who like to sleep at a luxurious and soft surface and do not want a hard surface to sleep, then these mattresses are not an option for you.
resistance to fire or high temperatures: another most important disadvantage of coconut shell is its lack of “resistance to fire”. coconut shells catch fire at a very low temperatures compared to stone aggregates. water absorption: coconut shells absorb more water. abrasion: coconut shells are
4. the 28 days compressive strength of coconut shell concrete was found to be 14.88 for 50% replacement by coconut shell aggregate under full water curing and it can be used for less important work. 5. reduction in weight found to be 15% and 25% for replacement by coconut shell aggregate 25% and 50% respectively.
coconut shell increases in the two mix ratios, coconut shell exhibited a higher compressive strength than palm kernel shell in the test. moreover, there is a cost reduction of 30% and 42% for concrete produced from coconut shell and palm kernel shell respectively [6,7]. siti
to make concrete greener and reduce the impact of rejected coconut shells on the environment, researchers have been testing the use of coconut fibers as full or partial replacement for aggregates. the ultimate goal is that concrete made of coconut husk aggregate could be used to produce low-cost housing for low-income areas around the world.
so this can save time. moreover, acoustically concrete is advantageous, as it’s virtually soundproof. concrete blocks also provide insulation against cold and heat and may reduce a home's energy usage. the most obvious thing that people think of when thinking about concrete homes is likely to be how they look.
ease of use and few issues – among the benefits of coir is its ph neutrality. coconut coir pros usually recommend mixing the product with other plant amendments, but you can use it straight too. it also has anti-fungal properties and many pests avoid living
disadvantages of reinforced concrete. one of the major disadvantages of reinforced concrete is the lack of tensile strength. though the concrete is strong in compression, it is very weak in tension. therefore, usually, except on special occasions, the contribution of the tensile strength of concrete is not considered in the design.
drawbacks of coconut mulch. no growing medium is absolutely perfect, and coconut mulch is among them. there are a few problems that may be associated with coconut
it shows a tendency of narrowing the fissure due to its age, which shows that the bond appears to be better between the coconut shell and the cement paste. highlights long term compressive and bond strength of coconut shell aggregate concrete. effect of curing conditions. sem analyzes on coconut shell and coconut shell aggregate concrete.
advantages:1. simple design. 2. more strength compared with other structures. 3. economical in construction. 4. attractive and decorative appearance.disadvantages1. the shell structures r
this indeed is an interesting question. i came across some research papers. i think, this particular review paper has an answer to your question. please read the conclusion from the paper given below. > * the possibility exists for the partial rep...
coconut shell is located in between the coconut flesh and coconut husk. this shell is naturally created to protect the inner part of coconut. this is shell is use to produce various handicraft applies and other applications. most of handmade decorative are created by using coconut shell due to their strength.coconut shells are also used to made
concrete countertops may look like massive slabs, but in reality, they are usually only 1-1/2 to 2 inches thick. the illusion that they are much thicker slabs is usually the result of a drop-front edging on the countertop. still, concrete countertops are very