Question The effect of maximum size of aggregate on concrete strength. Question What correction should be made for absorbed water and surface water carried by the aggregates? Question How is the air content of freshly mixed concrete determined? Question Popouts or popoffs? Question Using cube tests in lieu of cylinder tests. Question How ...
The American Concrete Institute. Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design ...
Concrete is used for the finished products, such as sidewalks, foundations, and the surface of many roads. Concrete contains sand, gravel and cement. Cement is the special hardening ingredient (the gray powder) that makes concrete harden. Cement is usually made of 60% lime (limestone), 25% silica, 5% alumina, and 10% other materials, such as ...
Jan 29, 2021 Why are fine and coarse aggregates used in concrete? They provide compressive strength and bulk to concrete. For a good concrete mix, aggregates need to be clean, hard, strong particles free of absorbed chemicals or coatings of clay and other fine materials that could cause the deterioration of concrete.
Concrete Technology Multiple Choice Questions on Strength of Aggregates. 1. Pick up the most appropriate statement from the following. a) Bulk density of normal weight aggregate is 1600 kg/m 3. b) Bulk density of normal weight aggregate is 2000 kg/m 3.
Multiple Choice Questions on Concrete Technology - Set 07 MCQ Concrete Technology Edit Practice Test Question Set - 07. 1. Finer grinding of cement ... The aggregate impact value of the aggregate used in (A) Building concrete is less than 45 (B) Road pavement concrete is less than 30 (C) Runway concrete is less than 30 (D) All the above ...
Coarse aggregates (Fig. 5-2) consist of one or a com-CHAPTER 5 Aggregates for Concrete bination of gravels or crushed stone with particles predominantly larger than 5 mm (0.2 in.) and generally between 9.5 mm and 37.5 mm (3 8 in. and 11 2 in.). Some natural aggregate deposits, called
Show Answer. Answer (C) Compaction factor test. Q2. The maximum amount of dust which may be permitted in aggregates is. (A) 5% of the total aggregates for low workability with a coarse grading. (B) 10% of the total aggregates for low workability with a fine grading. (C) 20% of the total aggregates for a mix having high workability with fine ...
Concrete Technology Multiple Choice Questions on Classification of Aggregates 1. According to geological origin, aggregates is/are classified into _____ types. a) 1 b) 2 c) 3 d) 4 Answer b Clarification There are 2 types of aggregates based on geological origin. They
Concrete In Building Materials - Concrete In Building Materials objective questions and answers. 1. The shrinkage of ordinary concrete is about. 2. The orientation of aggregate in concrete is. 3. The microscopic nature of concrete is. 4. The durability of concrete is proportional to.
Concrete Technology Objective Questions with Answers pdf - Set 17 ... According to Water-Cement Ratio Law, the strength of workable plastic concrete (A) Depends upon the amount of water used in the mix (B) Does not depend upon the quality of cement mixed with aggregates (C) Does not depend upon the quantity of cement mixed with aggregates (D ...
aggregates. For e.g., a concrete mix of proportions 124 means that cement, fine and coarse aggregate are in the ratio 124 or the mix contains one part of cement, two parts of fine aggregate and four parts of coarse aggregate. The proportions are either by volume or by mass. The water-cement
Sep 09, 2021 8 answers. Sep 8, 2016. One of the most important component in hydraulic cements is calcium di and tri-silicates-based cement, which is widely
Question 1. Which of the following true regarding CONCRETE ADMIXTURES? A. Admixtures can restore loads of concrete that might need to be rejected due to delays or other complications B. They can improve the performance of problem concrete by modifying its characteristics and enhancing workability C. Both A and B D. None of the above
Fig 1 Aggregates used in production of concrete. The aggregates are broadly classified into two types based on the size, namely- fine aggregate and coarse aggregate. In this article, we discuss the properties of the standard aggregates used in the production of concrete as per the American Standards (ASTM- C33/C33M).
Aggregates, Concrete Asphalt QA - Ask your aggregate, concrete or asphalt questions for free. Get answers from peers in the industry. www.aggregateresearch.com - Latest industry news on Aggregates, Asphalt, Cement, Concrete and more.
Jul 22, 2020 When concrete is mixed, the water present in the mix coats itself on the surface of the aggregates. This thin film results in a high water-cement ratio in the vicinity of the aggregates. Owing to the high w/c ratio, during hydration reaction, a rather porous network is formed, resulting in a weaker section surrounding the aggregates.
Sep 12, 2021 The most common classification of aggregates on the basis of bulk specific gravity is lightweight, normal-weight, and heavyweight aggregates.
Jan 06, 2016 Question We are having problems entraining air and maintaining slump. Our sand gradation has changed, but our supplier says it still meets ASTM C33. Shouldnt the concrete stay the same if the sand still meets the requirements? Answer How we purchase and sell aggregates is quite different, and it can lead to trouble. Most specifications ...
You have your wheelbarrow, concrete mixer and shovel all ready. But the hard part of making concrete, even with the best of tools, is getting the mixture right. Concrete has been used for centuries, but the concrete mixtures used today have come a long way from the mud mixtures that were once used. Take this quiz to see what you know about how concrete is made.
22. Density of Concrete? 23. No. of Cube samples required for testing Compressive Strength for 100 m3 of concrete? 24. List out Shape Tests on Coarse Aggregate? 25. Aggregate Impact value of material A is 15 and that of B is 35. Which one is better for surface course?
The suitability of the fine sand of zone 4 for use in reinforced concrete should be tested. For sands, the sand content of the mix should be low whose greater part is smaller than 60C micron. In general, finer the grading of the fine aggregate, higher should be the coarse/fine aggregate ratio. Typical values are shown in Table 4.23.
Coarse Aggregate (Coarse Aggregate Part / Concrete Parts ) * Concrete Volume (3/5.5) * 2 1.09 m 3 . Water Cement Ratio. According to IS 10262 (2009), Assuming Water-Cement Ratio for the Concrete as 0.45. Required Amount of Water W/C Ratio X Cement Volume
Question is An excess of flaky particles in concrete aggregates., Options are (A) decreases the workability, (B) increases the quantity of water and sand, (C) more than 15% are not desirable, (D) all the above., (E) , Leave your comments or Download question paper.
Jun 15, 2002 At a Dec. 2, 2001 meeting, committee members approved the formation of C09.47 on Self-Consolidating Concrete and Fred Kinney of Essroc was named subcommittee chairman. For more information, contact Jim Olshefsky, ASTMs staff manager of C09, Concrete and Concrete Aggregates, at jolshefsastm.org.
Recycled concrete aggregate (RCA) is the designation used in BS 8500-2 for recycled aggregate principally comprising crushed concrete. Designations of recycled aggregate other than RCA are of lower quality and may contain significant quantities of masonry which would preclude or limit their use in structural concrete.
The Effect of Aggregate Properties on Concrete Concrete is a mixture of cementious material, aggregate, and water. Aggregate is commonly considered inert filler, which accounts for 60 to 80 percent of the volume and 70 to 85 percent of the weight of concrete.
exposed aggregate concrete question. We are in the beginning stages of planning for an inground pool. Since we are new to this pool business, my question lies with the pool surround. Pavers are out of question- they are simply too expensive. I thought we would go to simple concrete to be cost effective. My husband likes the exposed aggregate.
According to the petrological characteristics, concrete aggregates are classified as heavy weight, normal weight and light weight According to the surface texture of the particles, the concrete aggregates are classified as glassy, smooth, granular, rough, crystalline, honey combed and porous Answer All the above
If the aggregate correction factor for a given source of fine and coarse aggregate is found to be 0.2% in a pressure air meter, and an air content value of 5.0% is read on the gage of the same air meter containing concrete with the same aggregate, what is the correct air content?
Pick up the correct statement from the following Options are 20 bags of cement make one tonne. The weight of ingredients of concrete mix, is taken in kilograms. The finished concrete is measured in cubic metres. Water and aggregates are measured in litres.
The factors that govern the workability of fresh concrete are a) The quantities of cement paste and aggregate relative b) The plasticity of the paste itself 18 Edition 2 UPDA Exam Questions for Civil Engineers 2016 c) The grading of aggregate d) The shape and surface characteristic of the aggregate e) All of above 132.
ACI Study Guides and Practice Test Videos. Welcome to SI Certs ACI reference page Weve gone through all of the ASTMs and gathered helpful information you can review to pass the ACI Level 1 Concrete Field Testing Technician test. We shot videos of field tests that you need to master to pass the exam. Whether youre planning on taking ...
Check the answers to frequently asked questions on building materials like ready-mix concrete, sand, masonry, plumbing supplies, bricks, and blocks. Call Bayshore
Content Straight from the Experts. The idea that wisdom is knowledge shaped by practical experience goes to the heart of the gray pages. The manual is written, maintained, and edited by ASTM members of Subcommittee C09.97 with wide and deep real-world backgrounds in concrete and aggregate testing.
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