Mortar mixes: All mortars are specified under ASTM C270 Mortar types are classified into classes N to M, classification is by difference in strength and workability , as the strength decreased the workability increase Hw 1: Complete the following table upon reading the chapter Mortar type Bond strength Workability Use Type N mortar Good Good Exterior or veneers non- load bearing walls, interior load-bearing walls Type S mortar Туре O mortar Туре M mortar

Mortar mixes: All mortars are specified under ASTM C270 Mortar types are classified into classes N to M, classification is by difference in strength and workability , as the strength decreased the workability increase Hw 1: Complete the following table upon reading the chapter Mortar type Bond strength Workability Use Type N mortar Good Good Exterior or veneers non- load bearing walls, interior load-bearing walls Type S mortar Туре O mortar Туре M mortar

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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If the target slump of concrete is 30 mm, the maximum nominal size of the coarse aggregate is 25 mm, and the smallest nominal size is 9.5 mm, how much water is needed in the ordinary concrete mix? If the target slump of concrete is 85 mm, the maximum nominal size of the coarse aggregate is 37.5 mm, and the smallest nominal size is 9.5 mm, how much water is needed in the ordinary concrete mix? If the compressive strength of concrete at 28 days is 38 MPa and the concrete is non-air entrained, what is the water-cement ratio of the concrete mix? If the required compressive strength of air entrained concrete is 26 MPa, what is the water-cement ratio of the concrete mix? The required Class D concrete is 5 cubic ft. What is the volume of sand in the 5 cubic ft. concrete mix. Mixing water is one half of the amount of cement powder.
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Will guve upvote if can answer Design the concrete mix according to the following conditions. Design Environment Pavement slab, (cold climate) Required design strength = 3000 psi Slab thickness = 12 in. Statistical data indicate a standard deviation of compressive strength of 250 psi is expected (more than 30 samples). Only air entrainer is allowed. Available Materials: Air entrainer: Manufacture specification is 0.15 fl oz/1% air/100 Ib cement. Coarse aggregate: 2 in. nominal maximum size, crushed stone Bulk oven-dry specific gravity = 2.573 Absorption = 0.1% Oven-dry rodded density = 120 pcf Moisture content = 1% Fine aggregate: Natural sand Bulk oven-dry specific gravity = 2.54 Absorption = 0.2% Moisture Content = 3.67% Fineness modulus = 2.68 Required Compressive Strength Water-Cement Ratio Coarse Aggregate Requirement Check Aggregate Size Air Content (Use Maximum) Slump (Use Maximum) Water Content Cement Requirement Admixture Fine Aggregate Requirement Final Batch Quantities…
Three standard mortar cubes were made using nonpotable water available at the job site, and three others were made using potable water. The cubes were tested for compressive strength after seven days of curing and produced the following failure loads in kilograms:Based on these results only, would you accept that water for mixing concrete according to ASTM standards? Why?
In order to evaluate the suitability of nonpotable water available at the job site for mixing concrete, six standard mortar cubes were made using that water and six others using potable water. The cubes were tested for compressive strength after 7 days of curing and produced the loads to failure (in kN) shown in Table P6.21. a. Based on these results only, would you accept that water for mixing concrete according to ASTM C94? b. According to ASTM C94, are there other tests to be performed to evaluate the suitability of that water? Discuss briefly. TABLE P6.21 Cubes Made with Cubes Made with Potable Water Nonpotable Water 64.6 73.5 70.4 74.8 63.0 79.7 71.6 69.8 70.6 83.7 64.0 74.4
You are working on a concrete mix design that requires each cubic meter of concreteto have 0.40 water–cement ratio, 1165 kg/m3 of dry gravel, 4% air content, and 335kg/m3 of cement (Specific Gravity = 3.15). The available gravel has a specific gravityof (S.G) gravel = 2.7, a moisture content of 1.6%, and absorption of 2.4%. The availablesand has a specific gravity of (S.G) sand = 2.5, a moisture content of 4.8%, andabsorption of 1.5%.For each cubic meter of concrete needed on the job, calculate the mass of cement,moist gravel, moist sand, and water that should be added to the batch. Summarizethe total the mix design in a table.
1. Question 2 Refer to Appendix A for tables and equations to be used. Use the CNCI method. You are given the following design parameters for a concrete mix: 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 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 density of 2.86 is going to be used for the mix. The slump on site is specified as 75 mm. The concrete is going to be compacted by moderate vibration on site. Calculate and show the amount of water, cement, stone and sand that is needed to make up 1 m of concrete mix as specified above. water requirementinliters w:c ratio • Cement content (kg/m3 of concrete) = • Mst = CBDS: (K – 0.1 FM) M. M.. • Vols = 1000 –( + D.
According to astm how much content of lime shall be added to Portland cement and how it is calculated
Three mortar mixes were prepared with water to cement ratios of 0.50, 0.55, and 0.60. Three 2-in. mortar cubes were prepared for each mix. The cubes were cured for 7 days and then tested for compressive strength. The test results were as shown in Table.Determine the following:a. The compressive strength of each cube.b. The average compressive strength for each mix.
(b) If you were to choose a blended cement for a concrete structure in a marine environment, which of the choices below would you choose and why? 10% Slag 60% Slag 90% Slag 90% OPC 11. 40% OPC 111. 10% OPC Cs Scanned with CamScanner