EBK MATERIALS FOR CIVIL AND CONSTRUCTIO
4th Edition
ISBN: 8220102719569
Author: ZANIEWSKI
Publisher: PEARSON
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Textbook Question
Chapter 6, Problem 6.8QP
Define
a. interlayer hydration space
b. capillary voids
c. entrained air
d. entrapped air
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Q.2 The required design span for the beam given in Q.1 is increased to 18 ft. The design loads
are the same as given in Q.1 Check the adequacy of a 10"x16" 10 Caribbean Pitch Pine –
(Select Structural) for this these design conditions.
The timber floor framing for a building comprise floor joists using 2" wide nominal lumber
is to be constructed as shown in Fig. 1. The Dead load (D) = 26 lbs./ft² (inclusive of joists
and flooring) and the live load L= 40 lbs./ft². Lateral torsional buckling is prevented for all
members and normal service conditions and temperatures are expected.
(i) Design the floor joists using 2" wide nominal lumber using Southern Pine No. 1
(ii) Design the floor beams using Caribbean Pitch Pine (Select Structural). (Assume a 8" x
14” trial section to estimate beam self-weight for your initial design). Density of
Caribbean Pitch Pine = 50 lbs/ft³ (800 kN/m³).
P12.38 WP At a point on the free surface of a stressed body, a normal stress of 64 MPa (C) and an unknown positive shear stress exist on a horizontal plane. One principal stress at the point is 8 MPa (C). The absolute maximum shear stress at the point has a
magnitude of 95 MPa. Determine the unknown stresses on the horizontal and vertical planes and the unknown principal stress at the point.
Chapter 6 Solutions
EBK MATERIALS FOR CIVIL AND CONSTRUCTIO
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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- A sawn timber beam of dimensions 8"x14" has is required for a span of 16 ft. The uniformly distributed loads are Dead (D) = 350 lbs./ft and live (L) = 400 lbs./ft. The dead load includes the beam self-weight and lateral torsional buckling is prevented. The beam is to be used in an indoor environment (MC > 19º) in normal temperatures. Using Caribbean Pitch Pine (Select Structural), check that the section chosen is adequate.arrow_forward2. Find the moment of inertia and radius of gyration about the coordinate axes of a thin rectangular plate of constant density bounded by the lines x=3 and y = 3 in the first quadrant.arrow_forwardVehicle begin to arrive at a parking lot at 6:00 am at a rate of 8 per minute. No vehicles arrivefrom from 6:20 to 6:30 am. From 6:30 am on vehicle arrive at a rate of 2 veh/min. The parkinglot attendant processes incoming vehicles at a rate of 4 veh/min throughout day. AssumingD/D/1 queue, determine total vehicle delayarrow_forward
- A cantilever beam 12 ft long supports a uniform service superimposed deadload of 1 kip/ft, and a concentrated service live load of 14 kip at the free end. Theconcrete compressive strength is 4 ksi, and the steel yield strength is 60 ksi. Thebeam section at the support is shown. Find the adequacy of the section inresisting bending moment at the support.arrow_forwardu(t) (Uss) -1 a/w = 1.0 M 1 2 3 Tarrow_forwardplease helparrow_forward
- Please use MATLAB with codes and figures.Recreate the following four Figures of the textbook using MATLAB and the appropriate parameters. Comment on your observations for each Figure. List all of the parameters that you have used. The figures are attached belowarrow_forwardA simply supported beam for a building interior with 18 ft span has a cross section of 12 in width and 21 in overall depth. The beam is made with 5 ksi compressive strength concrete and 60 ksi reinforcing steel. The beam supports a uniform service superimposed dead load of 1.6 kip/ft, and a uniform service live load of 80 psf throughout the span. The beams are laterally spaced 20 ft apart c/c. Design this beam and show in a sketch.arrow_forwardThe dam presented below is 180 m long (in the direction perpendicular to the plane of the cross-section). For the water elevations given on the drawing: a) Construct the flow net (minimum number of equipotential lines should be 10), b) Calculate the rate of seepage for the entire dam, c) Find the total uplift force on the dam (ignore barriers), and d) Estimate the hydraulic gradient at points A, B, and D. Recommended to use a spreadsheet to include all equations for calculations of potentials.arrow_forward
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