Materials for Civil and Construction Engineers (4th Edition)
4th Edition
ISBN: 9780134320533
Author: Michael S. Mamlouk, John P. Zaniewski
Publisher: PEARSON
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Chapter 6, Problem 6.5QP
Define the C-S-H phase of cement paste.
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Flash-Set is the immediate stiffening of cement paste in a few minutes after mixing with water caused by.
A-Low C3A content
B-High C3A content
C-Low C3S content
D-High C3S content
d. Referring to Figure 5.9, which portion of the water in the aggregate reactswith the cement in the PCC mix?
d. Referring to Figure 5.9, which portion of the water in the aggregate reacts
with the cement in the PCC mix?
Chapter 6 Solutions
Materials for Civil and Construction Engineers (4th Edition)
Ch. 6 - What ingredients are used for the production of...Ch. 6 - What is the role of gypsum in the production of...Ch. 6 - What is a typical value for the fineness of...Ch. 6 - What are the primary chemical reactions during the...Ch. 6 - Define the C-S-H phase of cement paste.Ch. 6 - What are the four main chemical compounds in...Ch. 6 - Prob. 6.7QPCh. 6 - Define a. interlayer hydration space b. capillary...Ch. 6 - Prob. 6.9QPCh. 6 - The following laboratory tests are performed: a....
Ch. 6 - What is a false set of portland cement? State one...Ch. 6 - The watercement ratio is important because it...Ch. 6 - Discuss the effect of watercement ratio on the...Ch. 6 - Draw a graph to show the general relationship...Ch. 6 - Students in the materials class prepared three...Ch. 6 - Students in the materials class prepared three...Ch. 6 - Two batches of cement mortar with properties as...Ch. 6 - What are the five primary types and functions of...Ch. 6 - Why isnt pozzolan used with Type III cement?Ch. 6 - What type of cement would you use in each of the...Ch. 6 - In order to evaluate the suitability of nonpotable...Ch. 6 - Three standard mortar cubes were made using...Ch. 6 - Four standard mortar cubes were made using...Ch. 6 - Discuss the problem of disposal of waste water...Ch. 6 - State five types of admixtures and discuss their...Ch. 6 - Prob. 6.27QPCh. 6 - Under what condition is an air-entraining agent...Ch. 6 - If a water reducer is added to the concrete mix...Ch. 6 - Prob. 6.30QPCh. 6 - A concrete mix includes the following ingredients...Ch. 6 - The results of an experiment to evaluate the...Ch. 6 - The results of a laboratory experiment to evaluate...Ch. 6 - Referring to Table P6.34, Mix No. 1 was designed...Ch. 6 - Two batches of concrete cylinders were made with...Ch. 6 - Two batches of concrete cylinders were made with...Ch. 6 - What is the source of fly ash? Why is fly ash...Ch. 6 - A materials engineer is working in a research...Ch. 6 - A materials engineer is working in a research...
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- What is the range of fineness of cement according to ASTM standardarrow_forward4b. Deformation occurs on freshly lay concrete when it finally set or harden.discuss the various causes for dimensional changes in the hardened concrete.arrow_forwardCompute the Fineness Modulus for fine aggregate.arrow_forward
- Question 16 The required W/CM ratio for our concrete mix is 0.65. The amount of water required in the mix is 100 kg. There is 10 % silica fume in the cementing materials. Find the mass of the certent and the silica fume in this mix. Show all your work.arrow_forwardChoose one common mineral that is used incement and explain how this affects theperformance of concrete. Subject: Geologyarrow_forwardIn determining consistency of cement, the completion of mixing and placing the paste in Vicat mould should not exceed 5 minutes and not less than ___________ minutes.arrow_forward
- Design the concrete mix according to the following conditions: Design environment Tennis court, subjected to freezing Required design strength =21 MPa Slab thickness=300 mm Statistical data indicate a standard deviation of compressive strength of 3.7 MPa is expected (for 50 samples) Only air entrainer is allowed Available materials: Air=7% Air entertainer: Manufacturer specification is 9.0 ML /1% air/100kg cement Slump=50 mm Coarse aggregate: 50 mm nominal maximum size, crushed stone Bulk volume oven-dry specific gravity=2.61, absorption=2.8%, oven-dry rodded density=1870 kg/m3 Moisture content=1% Fine aggregate: Natural sand Bulk oven-dry specific gravity=2.54, absorption=3.4% Moisture content= 4.5% Fineness modulus=2.60 Cement: Type I, relative density=3.1arrow_forwardRefer to Appendix A for tables and equations to be used. Use the CNCI method. water requirementinliters w:c ratio • Cement content (kg/m of concrete) = • Mat = CBD (K – 0.1 FM) You are given the following design parameters for a concrete mix: M. M. D. • Vols = 1000 - The compressive strength of the concrete mix must be 40 MPa after 28 days. The cement that is going to be used is a CEM I 52.5 with a relative density of 3.14. The stone available Taps vis % water 30 is a 19.0 mm stone with a dry compacted bulk density (CBD) of 1780 kg/m3 and a relative density of 2.24. An average, natural sand with a fineness modulus of 2.45 and a relative 25 20 density of 2.86 is going to be used for the mix. The slump on site is specified as 75 mm. 15 The concrete is going to be compacted by moderate vibration on site. 10 5 Calculate and show the amount of water, cement, stone and sand that is needed to make 10 15 20 Тарв up 1 m3 of concrete mix as specified above.arrow_forwardWhat is the conclusion in the Fineness of Cement results in the image belowarrow_forward
- Compute for the corrected amount of water needed in the concrete mix if the mass of fine and coarse aggregates are 650 kg and 780 kg, and both have an absorption of 1.5% and 2% respectively. Water/cement ratio is 0.50 and the mass of cement is 260kg.arrow_forwardUsing cement chemistry notation what is the hydrated cement phase MAINLY responsible for strength and durability in concrete.arrow_forwardRate of Tricalcium silicate (C3S) is higher in Type III cement.arrow_forward
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