"Write MATERIALS FOR MAKING CONCRETE Slump" One concrete grade was used for this laboratory investigation, C50 (50 MPa) at 28 days after standard water curing, with main ingredients as follows: Cement Portland cement (OPC) - 52.5N strength Coarse aggregates 4mm - 20 mm Crushed Fine aggregate Uncrushed Water Tap water Slump is required between 30-60 mm and this needs to be monitored during casting

"Write MATERIALS FOR MAKING CONCRETE Slump" One concrete grade was used for this laboratory investigation, C50 (50 MPa) at 28 days after standard water curing, with main ingredients as follows: Cement Portland cement (OPC) - 52.5N strength Coarse aggregates 4mm - 20 mm Crushed Fine aggregate Uncrushed Water Tap water Slump is required between 30-60 mm and this needs to be monitored during casting

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

If you knew that the cubic compressive strength of a certain type of concrete is 35 MPa, then calculate the resulting load during the examination, the maximum force applied by the test device)? 1- Fission tensile test 2- Fault modulus test 3- Compressive test for cylinder
Design a concrete mix according to the following conditions: Design Specifications Concrete ramp (not reinforced) Slab thickness =270 mm Design strength (fc) = 25.5 MPa Standard deviation s= 1.86 MPa on 200 specimens Environment = Severe exposure to freeze-thaw and de-icing chemicals Slump = 50 mm Materials Available Cement: Type GU; specific gravity 3.15 Admixture: Air entraining admixture 8 ml/1% air/100 kg cement . Coarse Aggregate: Nominal maximum size = 37.5 mm Type = Crushed stone Bulk oven-dry specific gravity = 2.63 Absorption = 2.1% Oven-dry rodded density = 1755 kg/m3 Moisture content = 1.5% Fine Aggregate Type = Natural sand Bulk oven-dry specific gravity = 2.55 Absorption = 3.1% Moisture content = 4.3% Fineness modulus = 2.40
The required design strength is 5000 psi No variation for the statistical variation in concrete strength please
1.40 In a ready-mix plant, cylindrical samples are prepared and tested periodically to detect any mix problem and to ensure that the compressive strength is higher than the lower specification limit. The minimum target value was set at 5,000 psi. The following compressive strength data were collected. Compressive Strength (psi) Compressive Strength (psi) Sample No. Sample No. 1 5595 11 6695 2 5139 12 5449 6359 13 5278 4 5192 14 6697 5 5188 15 5195 6. 5241 16 6021 7 5964 17 5320 5875 18 5657 6155 19 6595 10 5115 20 5235 a. Calculate the mean, standard deviation, and the coefficient of variation of the data. b. Using a spreadsheet program, create a control chart for these data showing the target value and the lower specification limit. Is the plant production meeting the specification requirement? If not, comment on possible rea- sons. Comment on the data scatter.
a) Calculate the temperature of aggregates to produce fresh concrete having the sametemperature with the ambient temperature. Following data in Table 1 could be used:
Concrete is required for walls of a building that will be Mild Exposed to freezing and thawing. The cross section of a wall is 300 x 1500 mm. The smallest spacing between reinforcing steel is 50 mm. The specified compressive strength of Compressive strength of concrete at 28 days is 35 MPa and a slump of 55 mm. Portland cement type I is used with specific gravity of 3.12, maximum size of aggregate 27 mm and fineness modulus of fine aggregate is 2.4, absorption capacity and moisture content of fine aggregate are of 0.92%, and 1.95% respectively. The dry-rodded unit weight of coarse aggregate is 1820 kg/m³, absorption capacity and moisture content of coarse aggregate are of 0.75%, and 1.85% respectively. Both aggregates have a bulk specific gravity (SSD) of (2.45). The aggregates conform to the ASTM C33-84 requirements for grading. Estimate the quantity of (cement, fine aggregate, coarse aggregate and water) for 1m³ concrete.
The curing period should be as long as is practical. The minimum time depends on several factors, such as type of cement, mixture proportions, required strength, ambient weather, size and shape of the structure, future exposure conditions, and method of curing. For most concrete structures, the curing period at temperatures above 5°C should be a minimum of 7 days or until 70% of specified compressive or flexure strength is attained. The curing period can be reduced to 3 days if high early strength concrete is used and the temperature is above 10°C.
@ (i) Concrete is used in a variety of applications from high-rise constructions to road pavements, bridges and floor slabs. Engineers will specify the strength of concrete mixes needed for each specific application. Compressive stress testing is carried out on test samples from concrete batches for purposes of quality control. In the space provided, sketch and label the fracture pattern of the concrete test piece after a compressive test. musgaib edt nodig Stansi VOR beforomo of bebe si giordinien fest2 quintetoeditedal budala wold Talno banoqquz odlo dianorte sliznat big or hobson axed loota 4300 GAOI (0)
indicate whether their inclusion to provide a concrete of equivalent 28 day strength, is likely to enhance or reduce resistance to each of the processes stated below: Alkali Silica Reaction (ASR) in concrete Chloride ingress in concrete (not corrosion) i. 11. cs Scanned with CamScanner
Design the concrete mix according to the following conditions: Design environment Pavement, subjected to freezing Required design strength =21 MPa Slab thickness=300 mm Statistical data indicate a standard deviation of compressive strength of 1.7 MPa is expected (more than 30 samples) Only air entrainer is allowed Available materials: Air entertainer: Manufacturer specification is 9.5 ML /1% air/100kg cement Coarse aggregate: 50 mm nominal maximum size, crushed stone Bulk volume oven-dry specific gravity=2.57, absorption=2.8%, oven-dry rodded density=1922 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=3.1
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=3.1
Concrete is required for walls of a building that will be Severe Exposed to freezing and thawing. The cross section of a wall is 300 x 1500 mm. The smallest spacing between reinforcing steel is 50 mm. The Required Average Compressive Strength of concrete at 28 days is 40 MPa and a slump of 55 mm. Portland cement type I is used with specific gravity of 3.12, maximum size of aggregate 27 mm and fineness modulus of fine aggregate is 2.4, absorption capacity and moisture content of fine aggregate are of 0.92%, and 1.95% respectively. The dry-rodded unit weight of coarse aggregate is 1820 kg/m³, absorption capacity and moisture content of coarse aggregate are of 0.75%, and 1.85% respectively. Both aggregates have a bulk specific gravity (SSD) of (2.45). The aggregates conform to the ASTM C33-84 requirements for grading. Estimate the quantity of (cement, fine aggregate, coarse aggregate and water) for 1m³ concrete.