Flexural strength of prisms is determined on 28 days of curing and results (Table 4) show that maximum strength 4.98 MPa has been given by concrete made using natural aggregate (R0C) mix as compared to the strength achieved 4.67 and 4.88 MPa for 100%
Sep 28, 2014· Green concrete is a very cheap to produce, because, for e.g. waste products are used as a partial substitute for concrete materials, the charges for the disposal of waste are avoided, energy consumption in the production is lower and durability is greater.Онлайн-запрос
Advantages of Green Concrete. Reduction of the concrete industry’s CO2-emmision by 30 %. Increased concrete industry’s use of waste products by 20%. NO environmental pollution and sustainable development. Green concrete requires less maintenance and repairs. Green concrete having better workability than conventional concrete.Онлайн-запрос
Jun 22, 2011· It is made from a combination of an inorganic polymer and 25 to 100 percent industrial waste. Here is a list of 4 benefits to using green concrete for your next project. 1. Lasts Longer. Green concrete gains strength faster and has a lower rate of shrinkage than concrete made only from Portland Cement.
strength of concrete. The compressive strength, split tensile strength were found to be reducing when waste wood powder is more than40%.The optimum proportion of the wooden powder by which the maximum strength is achieved were found to be light in weight compared to the normal concrete and environment friendly VI. CONCLUSION
Properties of Green Concrete Mix by Concurrent use of Fly Ash and Quarry Dust A.Krishnamoorthi, and G. Mohan Kumar materials by waste products may decrease the cost, reduce the energy consumption and also reduce the examined the slump and the compressive strength of concrete using quarry dust as fine aggregate and crushedОнлайн-запрос
Developments in chemical admixtures: superplasticizers, air entraining agents, etc., help in controlling production techniques and, in achieving the desired properties in concrete. Use of waste products is not only a partial solution to environmental and ecological problems; it significantly improves the microstructure, and consequently theОнлайн-запрос
Nov 25, 2008· “By using it for real applications, our process can make the ash a useful commodity instead of a waste product. It could also create new industry and new jobs inОнлайн-запрос
The fibre was introduced in varying percentages (0.2%, 0.4%, and 0.6%) by weight of concrete. The compressive strength of concrete containing 0.4% polypropylene fibre at 28 days has the highestОнлайн-запрос
Oct 06, 2020· In 1917 the secret for maximum strength Roman cement was found to be activated silicates in volcanic fly ash. Waste product fly ash from burning coal to produce electricity was used to replace Portland cement in the Hoover Dam spillway as proof cheap waste fly ash (now sold by Boral) made the stronger Roman concrete.Онлайн-запрос
Concrete mixes obtained linear increase in 28-day splitting tensile strength from 2.84 MPa to 3.31MPa for concrete mix on replacement of fine aggregate with waste foundry sand at various percentages ofОнлайн-запрос
Apr 12, 2019· And for a result analysis, we get the maximum strength of concrete block by 10 % replacement as a fine aggregate, which were maximum strength among all agro-waste type concrete.Онлайн-запрос
Table 5 shows the values of tensile strength measured by diametral compression at 28 days of concrete containing 2% carbon fiber waste and conventional reference concrete, with consumption of 370 kg/m³ and water-cement ratio of 0.5 (4 specimens of each concrete). The average of tensile strength was 4.38 MPa for the fiber concrete and 3.63 MPaОнлайн-запрос
Sep 01, 2020· The compressive strength of the concrete with partial replacement of fine aggregate by granite waste powder is tabulated in Table 2 and also illustrated in Fig. 3.From Fig. 3, it is observed that the strength of the concrete increases with an increase in the percentage of replacement of fine aggregate by granite waste from 0% to 30%.Онлайн-запрос
Nov 21, 2012· This specification allowed using RA for concrete production with maximum 28-day cube strength of 37 MPa, which is generally represented by the C30/37 class concrete. To use RAC in interior elements, where both coarse and fine RA are allowed, the maximum allowed replacement amount of NA by RA was kept at 35 % for the C20/25 concrete class.Онлайн-запрос
Jan 01, 2017· Concrete mixes with super plasticizer has showed higher compressive and tensile strength than the concrete mixes without super plasticizer. 9806 Mithanthaya et.al. / Materials Today: Proceedings 4 (2017) 9803–9806 Table 1. Results of Strength test on GPC prepared using Flyash and Glass Powder.Онлайн-запрос
Jan 01, 2008· Rebeiz (1996) investigated the strength properties of un-reinforced and reinforced polymer concrete using an unsaturated polyester resin based on recycled polyethyleneterephthalate (PET) plastic waste. The results showed that the resins based on recycled PET can be used to produce a good quality of precast concrete.
Association, 1991]. Foam concrete with improved strength using ground quartz sand with specific surface at least 2900 g/cm2 was reported by Votintsev and Mironova [1999]. Conclusively, the fineness of sand is important for the strength of foam concrete. The use of finer sand can improve the strength of resultant foam concrete.Онлайн-запрос
Nov 25, 2015· In graphs we observed that, the compressive strength of concrete is decreased in graphs 2 to 4 than graph 1.Deu to acidic environment, but we observed that the strengthОнлайн-запрос
The plastic waste material should mix in concrete mix. By this we have many advantages: They are:Inceresing the strength of concrete. waste material of plastic should use in concrete mix.
in eco-friendly lightweight interlocking concrete paving units (ICPU) using a mix ratio of 1:2:4. The lightweight sawdust and laterite were studied due to their abun-dant availability as industrial waste and cheap local construction material. Eco-friendly ICPU is a low-strength concrete with compressive strengths of 6.02–7.57Онлайн-запрос
Strength can be defined as ability to resist change. One of the most valuable properties of the concrete is its strength. Strength is most important parameter that gives the picture of overall quality of concrete. Strength of concrete usually directly related to cement paste. Many factors influence the rate at which the strength of concrete increases after mixing.Онлайн-запрос
Table 5 shows the values of tensile strength measured by diametral compression at 28 days of concrete containing 2% carbon fiber waste and conventional reference concrete, with consumption of 370 kg/m³ and water-cement ratio of 0.5 (4 specimens of each concrete). The average of tensile strength was 4.38 MPa for the fiber concrete and 3.63 MPaОнлайн-запрос
Jan 01, 2008· Rebeiz (1996) investigated the strength properties of un-reinforced and reinforced polymer concrete using an unsaturated polyester resin based on recycled polyethyleneterephthalate (PET) plastic waste. The results showed that the resins based on recycled PET can be used to produce a good quality of precast concrete.Онлайн-запрос
Sep 01, 2020· The compressive strength of the concrete with partial replacement of fine aggregate by granite waste powder is tabulated in Table 2 and also illustrated in Fig. 3.From Fig. 3, it is observed that the strength of the concrete increases with an increase in the percentage of replacement of fine aggregate by granite waste from 0% to 30%.Онлайн-запрос
Concrete mixes obtained linear increase in 28-day splitting tensile strength from 2.84 MPa to 3.31MPa for concrete mix on replacement of fine aggregate with waste foundry sand at various percentages ofОнлайн-запрос
Nov 21, 2012· This specification allowed using RA for concrete production with maximum 28-day cube strength of 37 MPa, which is generally represented by the C30/37 class concrete. To use RAC in interior elements, where both coarse and fine RA are allowed, the maximum allowed replacement amount of NA by RA was kept at 35 % for the C20/25 concrete class.
Association, 1991]. Foam concrete with improved strength using ground quartz sand with specific surface at least 2900 g/cm2 was reported by Votintsev and Mironova [1999]. Conclusively, the fineness of sand is important for the strength of foam concrete. The use of finer sand can improve the strength of resultant foam concrete.Онлайн-запрос
Nov 25, 2015· In graphs we observed that, the compressive strength of concrete is decreased in graphs 2 to 4 than graph 1.Deu to acidic environment, but we observed that the strengthОнлайн-запрос
Sep 24, 2018· The particle size of the sand, compaction method and cooling rate are critical to attain optimum properties. The sand addition to achieve the maximum compressive strength was 75 wt%. The compressive strength of optimum LDPE-bonded sand is comparable to C20/25 concrete and greater than typical Portland cement sandcrete.Онлайн-запрос
Aug 19, 2016· The general rule is that the more cement you have the stronger your concrete, but too much cement also brings with it too much heat generated from hydration which will cause cracks and also retard the reaction. The less water you have too the more...Онлайн-запрос
May 01, 2017· A.V.S.Sai. Kumar, Krishna Rao. By using 25% of wooden powder as a partial replacement to fine aggregate there is no change in compressive strength. Venkata Sairam Kumar, Dr. B. Panduranga Rao, Krishna Sai. By Using 25% of partial replacement of aggregates with waste material (wooden powder, sugarcane residue) improves hardened concreteОнлайн-запрос
The maximum compressive strength of 35.5 Mpa , is achieved at 30:70 replacement of FLYASH and GGBS respectively as compare to 34 Mpa of strength of conventional concrete for 14 days curing in potable water. Thus maximum strength is achieved in 70 % of GGBS replacement than other replacement levels.Онлайн-запрос
This paper investigates the creation of high-density impermeable concrete. The effect of the “cement, fly ash, and limestone” composite binders obtained by joint grinding with superplasticizer in the varioplanetary mill on the process of structure formation was studied. Compaction of structure on micro- and nanoscale levels was characterized by different techniques: X-ray diffraction, DTAОнлайн-запрос
From the results it can be observed that although the strength is maximum at 56 days, the 28 days strength is in the desired range from 80 to 100% of GGBS for F/B ratio of 0.55 and 0.5. The maximum strength obtained for F/B of 0.45 and 0.4 is 25.02 and 18.31 respectively at 56 days for 100% GGBS which is also acceptable range.