Concrete under water is a very delicate operation because inaccurately carried out concreting creates very serious problems. That’s the reason, experienced persons are required for under water concreting. There are following tips for better placement …
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Water to Cement Ratio
Water to cement ratio is ratio between the weight of water and the weight of cement that is used in a fresh concrete mix. Water to cement ratio is one the largest single factor on …
Continue readingVibration of Concrete
Vibration of concrete is carried out for the sake of consolidation. The main objective of vibration is to compact the concrete and to achieve the maximum possible density of concrete. Almost 5 to 8% by …
Continue readingAntibacterial Admixtures
Anti bacterial admixtures are used against organisms like insects, fungi or bacteria that affects the property of concrete. Bacterial affect is not minor effect to concrete, but they affects very adversely. Organisms release corrosive chemicals …
Continue readingBulk Density Of Aggregates
Bulk density of aggregates is the mass of aggregates required to fill the container of a unit volume after aggregates are batched based on volume. It depends on the packing of aggregate i.e. Either loosely …
Continue readingSpecific Heat | Definition | Affects On Concrete
Specific heat is the heat capacity of a material that it absorbs to raise the temperature by one degree Celsius. In case of concrete, it is the heat capacity of concrete. Specific heat is measured …
Continue readingThermal Diffusivity | Definition | Relation With Conductivity
Thermal diffusivity is used for the calculation of thermal conductivity. It represents the rate at which temperature changes within a defined mass. It is represented by δ and it is measured in meter square per …
Continue readingThermal conductivity | Definition | Conductivity Of Concrete
Thermal conductivity is the ability of the material to absorb heat. It can also be defined as the ratio between the heat flux and the temperature gradient. Unit of thermal conductivity is joules per second …
Continue readingThermal Curing Of Fresh Concrete | Curing Methods
In thermal curing heat is applied to the concrete for the purpose of accelerating the gain of early concrete strength. There are several thermal curing methods that can be used, but each method has some …
Continue readingEquations for Crack Width In Flexural Concrete Beams
There are many empirical equations have been developed for finding the maximum width of cracks. These equations were based on the statistical analysis of experimental result data. In ACI code, two expressions have been mentioned. …
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