Which of the following statements is correct? A) Pozzolans react with Calcium Silicate Hydrate (C-S-H) to form Calcium Hydroxide (C-H)   B) Pozzolans react with the by-product of cement hydration to produce a denser concrete   C) Use of pozzolans in a mix generally improves the durability and strength of the concrete   D) b and c

Q: 12-. can cause unsoundness of cement. b - Alkalis C- Cao a- sulfate compounds 13- At any stage of…

A: d )CaO and Mgo can cause unsoundness in cement . Option d is correct as lime and magnesia are…

Q: Once in civil engineering, what is the minimum curing period typically recommended for concrete…

A: In civil engineering, the minimum curing period for concrete structures typically depends on the…

Q: Problems: Identify the following as Element (E), Compound (C), Homogeneous Mix (HOM) or…

A:

Q: 1. What colour is ABS solvent cement? a. Grey b. Green c. White d. Yellow 2. What colour is primer…

A: 1. What colour is ABS solvent cement? a. Grey b. Green c. White d. Yellow Answer : The color of ABS…

Q: Hydration of cement is exothermic process that generates heat. The table below shows the heat…

A: When cement, water, compounds, and additives are mixed together, a significant increase in…

Q: We require a mix with a mean 28-day compressive strength of 28 MPa. The slump is selected to be 40…

A:

Q: In the manufacture of Portland cement, gypsum is added to the clinker and they are pulverised…

A: Solution- a)  i) Gypsum is a long-lasting admixture. ii) The addition of gypsum to the clinker…

Q: 1) The longer a concrete is exposed to moist curing, the stronger the hardened concrete will be.…

A: To Determine Whether the given statements are True or False.

Q: What are the two main reasons that steel corrodes inside reinforced concrete? ingress of chlorides…

A: Two major factors which cause corrosion of rebars in concrete structures are carbonation and ingress…

Q: The raw materials used in Portland Cement production are:

A: Portland cement: Portland cement is a calcium silicate cement made by firing a well-homogenized and…

Q: Which of the following directly causes sulfate attack in concrete? CH Delayed ettringite formation…

A: Sulfate attack in concrete is mainly caused by the reaction of sulfate ions with calcium hydroxide…

Q: The quality of aggregate packing affects: a) Cement use b) Slump c) Corrosion d) Early cracking

A: Aggregate plays important role in mixing of cement. Type of aggregate and grading of aggregate…

Q: At saturated surface dry (SSD) an aggregate's moisture condition is equal to its: air dry…

A: When aggregate particles are completely having dry surfaces, this situation is called the saturated…

Types of Cement

Cement is a fine mixture of limestone, chalk, or marl and clay which when mixed with water, becomes compacted due to the formation of strong molecular bonds. Due to hydration, cement turns into a hard mass when left for a sufficient amount of time upon mixing with water. The water turns the cement compounds into gel-like submicroscopic particles having higher surface areas. It is due to the hydration properties of cement, they are often known as hydraulic cement. For instance, Portland cement is a popular example in this category.