What are the effects of cement type on compressive strength of concrete?

When equal amounts of cement and water binder (w/b) are used, concretes with slag content have a lower compressive strength at early ages and higher compressive strength at late ages than Portland cement [2].

What is the relationship of properties of cement to the strength or durability of concrete?

While a more cement content usually grantees a higher strength at the same water content, a more cement content does not grantee a better durability performance. The durability of the concrete is not a one man show.

What are the effect of cement?

Depending on the level of exposure, effects may range from redness to chemical burns and blindness. Inhaling high levels of dust may occur when workers empty bags of cement. In the short term, such exposure irritates the nose and throat and causes choking and difficult breathing.

What are the different factors affecting durability and strength of concrete?

Factors Affecting Strength of Concrete

• Quality of Raw Materials.
• Water / Cement Ratio.
• Coarse / fine aggregate ratio.
• Aggregate / Cement Ratio.
• Age of concrete.
• Compaction of concrete.
• Temperature.
• Relative humidity.

Is strength and durability the same?

Short answer: Strength is ‘how much load will it take? ‘ & Durability is ‘how long it will keep taking it’s designed load? ‘ In our training programs, we often find that audience take little longer time for defining Durability than Strength.

What affects concrete durability?

5.2 Concrete Durability. Concrete durability depends upon the degree of exposure, the concrete grade (or strength) and the cement content. A high density, alkali-resistant concrete will better resist the effects of moisture penetration.

How is compressive strength of cement determined?

The Compressive strength of a material is determined by the ability of the material to resist failure in the form of cracks and fissure. In this test, the impact force applied on both faces of Mortar specimen made with Cement and the maximum compression that cement specimen bears without failure recorded.

Is cement harmful to the environment?

The cement industry is one of the main producers of carbon dioxide, a potent greenhouse gas. Concrete causes damage to the most fertile layer of the earth, the topsoil. Concrete is used to create hard surfaces which contribute to surface runoff that may cause soil erosion, water pollution and flooding.

What affects cement strength?

Concrete strength is affected by many factors, such as quality of raw materials, water/cement ratio, coarse/fine aggregate ratio, age of concrete, compaction of concrete, temperature, relative humidity and curing of concrete.

What factors affect the compressive strength of concrete?

Type and amount of cement: The primary factors affecting concrete compressive strength is the amount of cement. The higher the cement content, the greater the tendency for shrinkage cracks to form while the concrete is curing and hardening. Types of cement also has a great impact on the properties of hardened concrete.

How to evaluate compressive strength of concrete?

Rate of Sampling of Concrete.

How do you calculate compressive strength of concrete?

Calculate the compressive strength using the formula S = P/A, where S is the compressive strength, P is the maximum load applied to the specimen and A is the area. Your final compressive strength value will be in units of lbf/in^2, which is the same as pressure or psi.

What is the Max compressive strain of concrete?

For normal weight concrete, the maximum stress is realized at compressive strain ranges from 0.002 to 0.003. however, for lightweight concrete, the maximum stress reached at strain ranges from 0.003 to 0. 0035.The higher results of strain in both curves represent larger strength.