What are the typical deleterious substances in aggregates that affect portlandcement concrete? Discuss these effects.

Q: Question 1

A: The answer is attached below; please check. Explanation:Step 1:Step 2:Step 3:Step 4:Region 1:…

Q: In the context of concrete structures, what is shrinkage? How does it occur? Discuss the factors…

A: Shrinkage:-  The decrease in either length or volume of material results from changes in moisture…

Q: Amswer the following questions: Part I (True or False) 1) Aggregates having high absorption value…

A: 1) False - Aggregate having low absorption ratio are preferable for concrete so that water- cement…

Q: How does shape and surface texture of aggregate effect workability, water requirement, and bond in…

A: Concrete is a combination of cement, aggregate, as well as liquid. Aggregate, typically makes up 60…

Q: What is your recommendation for the maximum size of coarse aggregate for the following situation? A…

A: Given :- No. 6 reinforcing bars at 6 inch centres The thickness of the slab is 10 in. The clear…

Q: sample of lightweight coarse aggregate weighs 532.3 g when oven-dried, 615.7 g when saturated…

A:

Q: In proportioning a concrete mix, the coarse and fine aggregates had the following properties…

A: Coarse aggregate weight = 800 lbDry aggregate weight = 350 lb

Q: When a sample subjected to the procedure of ASTM C40 produces a color darker than the standard…

A: Answer: The test sample shell have a mass of about approximately 450g and be taken from the larger…

Q: Based on the ASTM C33 standard for fine aggregate for Portland cement, what is the minimum…

A: Question askedis minimum percentage of aggregates that must pass the number 30 sieve in order to…

Q: Concrete is required for a building foundation that is placed on a soil with high chloride content.…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: 5.43 What is alkali-silica reactivity? What kinds of problems are caused by ASR? Mention two ways to…

A: Alkali Silica Reactivity Alkali-silica reactivity (ASR) is a chemical reaction that occurs between…

Q: Question 3

A: The answer is attached in detail below; please check. Explanation:Step 1:Ans (a): Types of Concrete…

Q: The recommended dosage on a viscosity modifying admixture is 5 fl oz/cwt. The proportions of the…

A: Recommended dosage on a viscosity modifying admixture = 5 fl oz/cwt. Coarse aggregate = 1800 lbFine…

Q: How does the increase of maximum aggregate size used in the concrete mix design affect the…

A: We know for best results the gradation should be well graded. For well-graded aggregates, the voids…

Q: Design a concrete mix for the following performances and ingredients: • Compressive strength at 28…

A: Consider the given data Density of CA=1600 kg/m3   AssumedSp Gr. of cement=3.15  AssumedSp Gr of…

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.