A concrete mix has been designed as follows with a target characteristic compressive strength of 32 MPa. Constituent GP Cement Stone Sand Water Unit Content (kg/m³) 350 1250 860 165 Before batching, the Technical Specialist assessed the aggregate moisture condition of the stone at 1.0% and sand at 3.5%. The Technical Specialist also reviewed that the absorption capacity of the stone and sand are 0.8% and 1.4%, respectively. How should he adjust the water content to maintain the effective water/cement ratio of the mix?

A concrete mix has been designed as follows with a target characteristic compressive strength of 32 MPa. Constituent GP Cement Stone Sand Water Unit Content (kg/m³) 350 1250 860 165 Before batching, the Technical Specialist assessed the aggregate moisture condition of the stone at 1.0% and sand at 3.5%. The Technical Specialist also reviewed that the absorption capacity of the stone and sand are 0.8% and 1.4%, respectively. How should he adjust the water content to maintain the effective water/cement ratio of the mix?

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

Mix design
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.
Create a design mix using the ACI DESIGN MIX PROCEDURE with the following parameters: Non-air Entrained Concrete Required Strength = 35 MPa Required Slump = 6 inches Maximum Size of CA = 3/4 inches Fineness Modulus of CA = 2.45 Density of CA = 1555 Kg/m3 SG of Water = 1.00 SG of Cement = 3.15 SG of CA = 2.84 SG of FA = 2.40
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.
Q3/: TILM We require a mix with a mean 28-day compressive strength of 26.5 MPa the size of the member and the spacing of the reinforcement require a slump of 50 mm and a Q maximum size of aggregate of 20 mm. Portland cement type I is used with specific gravity of 3.15, dry-rodded unit weight of coarse aggregate 1700 kg/m³ and bulk specific gravity (SSD) of 2.55. The fineness modulus of fine aggregate is 2.8 and bulk specific gravity (SSD) of 2.5. No air entrainment is required. Neglect water absorption and moisture content of both aggregates. 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.
Answer carefully the following questions : 1 Die is great Se me Meaning of normal con 3-what is the range of values of standard 4-How the consistency of cement paste is measured? 5-State the significance of initial setting time and final setting time of cement. 6-What is the range value of compressive strength for normal concrete 7 days and 28 days? ODOO TOSTSEC of C e Cheet or aggi gan grading on the properties of concrete? -Describe kinds of slump.. OF MOON Cone. what is the approximate value of Flexural su compressive 10-What is the approximate value of spli compressive strength? nave 25 MPa tor strength if we have 25 MPa for
Thank you so much. Please hand write if possible
Students in the materials class prepared three mortar míxes with water to cement ratios of 0.50, 0.55, and 0.60. Three 50-mm mortar cubes were pre- pared for each mix. The cubes were cured for 7 days and then tested for com- pressive strength. The test results were as shown in Table P6.16. ТАBLE P6.16 Mix w/c Мaximum Compressive Average Compressive Strength (MPa) No. Ratio Cube No. Load (kN) Strength (MPa) 1 79.4 1 0.50 80.1 81.9 1. 74.7 2 0.55 2 74.5 3 72.5 1. 65.8 2 69.3 3 0.60 71.2 Determine the following: a. The compressive strength of each cube. b. The average compressive strength for each mix. c. Plot the average compressive strength versus w/c ratios for all mixes. d. Comment on the effect of increasing w/c ratio on the compressive strength of the cubes.
Concrete is described to be durable partially as it does not need any protective coating even in a harsh environment. of Select one: O True O False The consistency of the standard paste test is carried out to O A. Determine the W/C which will produce a normal consistency paste of O B. Determine the cement Fineness O C. Determine the cement setting time OD. Determine the cement soundness OE. All of the above
What is the amount of cement in kilograms needed for the design mix? Use two decimal places
A concrete mix design uses coarse aggregates with NMAS of 19 mm. Fineness modulus of 2.8 and DRUW of 135 lb/ft^3. What is the mass of Coarse aggregates in the mix?