Concrete and Mix Proportion the rate of setting of concrete, since the superplasticizer will In order to study the effect of superplasticizer on the help to retain the concrete in liquid state for a longer time, properties of fresh and hardened concrete, mixes are and hence, reduce the slump loss during the transportation of prepared.
2.3. Water and its effect Water has two roles in concrete mixture. First, it reacts with cement chemically and hydrolyzes it; second, it makes the concrete fluid and functional. The water used for make concrete is drinkable water. The impurity of the water can have an adverse effect on the concrete strength. 3. SUPER PLASTICIZER
conventional concrete. 2. Effect of Superplasticizer on workability of conventional ... All aggregate must be free from dust as the dust ... stone with a maximum size of 20 mm. In addition, aggregates
Effect of re-dosing of SP3 to regain original slump 3.3 Effect on Compressive Strength The compressive strength of concrete after first dosage of superplasticizer is shown in table 5. The compressive strength of superplasticized concrete was found to be higher than that of control mix prepared without addition of superplasticizer.
Hence super plasticizers enhance the durability of concrete. Super plasticizers due to the reduction in water/cement ratio, reduce the penetration of chlorides and sulphates into the concrete and thus improve the resistance to the sea water or deicing effect. ADVERTISEMENTS:
replacement level of stone dust casted on 1 - 1.5% dose of super plasticizer with slump vale of 25 – which can be maintained by extra dose of 35 mm. Finally it can be stated that the stone dust is to be used in concrete with partially or fully replacement of fine aggregate. TABLE 4. Compressive Strength of Concrete Concrete Cube Group
It is observed that the compressive strength of the concrete cube generally increases on addition of super plasticizer. However as we kept on increasing the admixture the compressive strength up to a point start decreasing as shown in fig 3.
quarry dust concrete with the super plasticizer (conplast sp430). The specific objective of the study is to provide a range value for superplasticizer (conplast sp430) when using quarry dust concrete that best suit some important properties of concrete like compressive strength, durability and workability of concrete.
stone dust with sand by adopting water-binder ratio of 0.35. Super plasticizer (BASF) is used for better workability for high performance concrete. The result of these investigations demonstrates the strength characteristics of stone dust and the properties of fly ash based concrete mixes. Based on the results obtained, the replacement of
Crumb rubber concrete was produced by using 10% of recycled fine rubber 400 μm as the sand replacement. Superplasticizer with 0.25%, 0.5%, 0.75% and 1.0% contents were added into crumb rubber concrete without changing the water-cement ratio purposely to study the effects of superplasticizer to the concrete. The specimens
allows the concrete to flow through sections with congested reinforcement under its own weight alone, filling the M. Fadhil Nuruddin, Demie, M. Fareed Ahmed, and Nasir Shafiq Effect of Superplasticizer and NaOH Molarity on Workability, Compressive Strength and Microstructure Properties of Self-Compacting Geopolymer Concrete C
This paper studies the influence of stone dust on adaptability of polycarboxylate superplasticizer and cement by the experiment of paste slump and mortar slump flow. The results indicate that polycarboxylate superplasticizer mixed in mortar increases with stone dust mixed because of large specific surface and water demand of stone dust. There is little effect …
stone dust as fine aggregate in concrete it is found that there is increase in compressive, flexural and tensile strength of concrete (Nagpal et al ., 2013).
Careful use of superplasticizers is very important because of its relatively short effect on concrete workability. Rapid slump loss which results in loss of workability will occur 45 minutes after the introduction of superplasticizers. The rapid slump loss, compared with concrete without superplasticizers,
The super plasticizer is replaced with different dosages by weight of cement. The fresh properties of super plasticized concrete is studied on the results of, slump test, compaction factor test, vee-bee consist meter, it is observed that ( Chloride free
The super plasticizer is replaced with different dosages by weight of cement. The fresh properties of super plasticized concrete is studied on the results of, slump test, compaction factor test, vee-bee consist meter, it is observed that ( Chloride free
using stone dust as to give comparable strength to concrete. Stone dust has somehow similar or better mechanical properties to fine aggregate. Using of stone dust is also beneficial from the environmental aspect. Disposal of stone dust, a waste product, in the concrete construction is one of the efficient way of waste management.
stone dust and superplasticizer to reduce w/c ratio. Cubes and under reinforced beams were casted by replacing fine aggregate 25%, 50%, 75% and by stone dust and test have conducted for their relevant parameters. They concluded from the experiments that replacement of sand by stone dust