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What factors affect the compressive strength of concrete?
water /cement ratio
What is mean by pcc in civil engineering?
PCC in construction refers to Plain Cement Concrete, which is used as a preparatory base for laying RCC footing. Though PCC is also concrete, this is lean in nature, the ratio being 1:4:8. The compressive strength achieved with this mix is normally 7.5kN/sq.mm.
Difference between type k cement and cement fondue?
Type K cement is slightly expansive and helps reduce the shrinkage issues associated with normal cement in concrete mixes. Cement fondu is an accelerated cement that provide concrete higher earlier strength. It does not specifically compensate for shrinkage
What is target strength of concrete?
Target strength is the design strength which is determined by whom ever designed mixture of aggregates and the water/cement ratio.
What is cement concrete?
Concrete actually contains cement as well as sand and gravel. We say "cement concrete" because cement is an ingredient in concrete. And because the cement is what binds together the sand and gravel that make up the concrete.
Properties of cement concrete?
Properties of fresh concrete:WorkabilitysegregationBleedingHarshnessProperties of hardened concrete:DurabilityPermeabilityCreepShrinkage
What is correlation between strength of mortar to strength of concrete?
mortar are mixing by sand & cement and concrete is mixing by cement, sand & stone
What effect has the quantity of mixing water have upon the quality of concrete?
the strength of concrete is effected by water /cement ratio as the water/cement ratio increases the strength of the concrete decreases
What is stronger concrete or cement?
Concrete is stronger than cement.It is composed of aggregates (sand and gravel) and cement; and may be cast with reinforcing bar within it (reinforced concrete). Cement is only a part of concrete. Cement has no tensile strength while concrete has compressive and tensile strength.
What is the effect of age of concrete upon the water-cement ratio and strength curve?
The age of concrete significantly affects its water-cement ratio and strength. As concrete matures, its strength generally increases due to the ongoing hydration of cement particles, which leads to a denser microstructure. Initially, higher water-cement ratios may lower strength but are essential for workability; as concrete cures, the effective water-cement ratio decreases, contributing to strength gain over time. Ultimately, strength curves show that concrete continues to gain strength well beyond the initial setting period, often achieving substantial increases up to several months or years, depending on conditions.
What are the differences between cement mortar and concrete?
Cement mortar is a mixture of cement, fine aggregate and water.Concrete is a mixture of cement, fine aggregate, coarse aggregate and water.Generally, concrete have higher strength than cement mortar.
What is the affect of age of concrete upon the water cement ratio and strength curve?
As concrete ages, its strength typically increases due to continued hydration of the cement particles, which can affect the water-cement ratio's impact on strength. Initially, a lower water-cement ratio leads to higher strength, but as concrete matures, the difference in strength between varying ratios diminishes. This means that while a low water-cement ratio is critical for achieving high early strength, the age of the concrete plays a significant role in enhancing overall durability and strength over time, regardless of the initial ratio. Thus, the strength curve generally shows a rising trend with age, independent of the initial water-cement ratio.
What factors affect the compressive strength of concrete?
water /cement ratio
What is cement mad of?
Cement is hydrated limestone. Concrete is cement, stone and sand. Sometimes fiberglass fibers are added to increase strength.
What is the ideal cement and sand mix ratio for achieving optimal strength in a concrete mixture?
The ideal cement and sand mix ratio for optimal strength in a concrete mixture is typically 1 part cement to 3 parts sand. This ratio helps ensure a strong and durable concrete mix.
What is the recommended Portland cement mix ratio for optimal concrete strength and durability?
The recommended mix ratio for Portland cement in concrete is 1 part cement, 2 parts sand, and 3 parts gravel or crushed stone. This ratio helps to achieve optimal strength and durability in the concrete.
What is the recommended sand cement ratio for achieving optimal strength in a concrete mix?
The recommended sand to cement ratio for optimal strength in a concrete mix is typically 2:1. This means using two parts sand for every one part of cement.
