Question

In: Civil Engineering

In regards to the mix design of concrete, respond to each of the following by showing...

In regards to the mix design of concrete, respond to each of the following by showing detailed calculations. Use the tables and figures below.

1. If the concrete characteristic strength = 40 MPa, with 2.5% defective test results, what will be the target mean strength?

2. If the target mean strength of concrete = 30 MPa at 28 days, the coarse aggregate is uncrushed, using GP (General Purpose) cement, what is the water cement ratio W/C?

3. If the concrete slump = 8 mm, the maximum aggregate size = 10 mm, assume using crushed gravel and uncrushed sand, what is the value of the free water?

4. If aggregate specific gravity = 2.7, free water content = 180 kg/m3, cement content = 300 kg/m3, W/C = 0.6, % passing 600 μm sieve = 0.6, slump = 20 mm, maximum aggregate size = 10 mm, what is the content of fine aggregate?

5. If cement content = 300 kg/m3, water content = 180 kg/m3, gravel content = 1100 kg/m3, sand content = 750 kg/m3, how are the mix proportions represented by ratio?

Solutions

Expert Solution

Ally Wells answered 7 months ago
Next > < Previous

Related Solutions

7) You are working on a concrete mix design that requires each cubic yard of concrete...
7) You are working on a concrete mix design that requires each cubic yard of concrete to have a 0.45 water–cement ratio,2100 lb/yd3 of dry gravel, 250 lb/yd3 of water, and 5% air content. The available gravel (NMS = ¾”) has a specific gravity of 2.6 , moisture content of 2.5% and absorption of 4.5%.The available sand has a specific gravity of 2.4, a moisture content of 2.5% and absorption of 2%. Air entrainer is to be included using the...
7) You are working on a concrete mix design that requires each cubic yard of concrete...
7) You are working on a concrete mix design that requires each cubic yard of concrete to have a 0.45 water–cement ratio,2100 lb/yd3 of dry gravel, 250 lb/yd3 of water, and 5% air content. The available gravel (NMS = ¾”) has a specific gravity of 2.6 , moisture content of 2.5% and absorption of 4.5%.The available sand has a specific gravity of 2.4, a moisture content of 2.5% and absorption of 2%. Air entrainer is to be included using the...
Design a concrete mix for the superstructure of a building using DoE mix design method requiring...
Design a concrete mix for the superstructure of a building using DoE mix design method requiring a characteristic strength of 40MPa at 28days and a slump of 30-60mm. The materials available are ordinary Portland cement, and uncrushed fine and coarse aggregates of specific gravity of 2.65. The maximum nominal size of coarse aggregate is 10mm and fine aggregate confirms to the grading zone III. Neglect the effect of standard deviation and other factors.
concrete C25 mix design lab report
concrete C25 mix design lab report
Design a concrete mix for reinforced concrete beams of a structure. The structure is located in...
Design a concrete mix for reinforced concrete beams of a structure. The structure is located in a locality wherein water has excess of chlorides in it. Required average compressive strength of concrete has been determined to be 4700 psi. Beams have cross-section of 9 in. x 21 in. reinforced with 4 # 6 bars. Reinforcement has a concrete cover of 1.25 in. and there is a clear space of 1.0 in. between form surface and steel bars. Fine aggregate has...
Design the concrete mix according to the following conditions: Design Environment Caissons for Bridge pier crossing...
Design the concrete mix according to the following conditions: Design Environment Caissons for Bridge pier crossing to the Outer Bankers, NC Required design strength=4800psi Minimum dimension = 12 in. Minimum space between rebars = 2.5 in. Minimum cover over rebars = 2.5 in. Statistical data indicate a standard deviation of compressive strength of 250 psi is expected (more than 30 samples). Only air entrained is allowed. Available Materials Air entrainer: Manufacture specification is 0.15 fl oz/1% air/100 lb cement. Aggregate:...
Design the concrete mix according to the following conditions: Design Environment Caissons for Bridge pier crossing...
Design the concrete mix according to the following conditions: Design Environment Caissons for Bridge pier crossing to the Outer Bankers, NC Required design strength=4800psi Minimum dimension = 12 in. Minimum space between rebars = 2.5 in. Minimum cover over rebars = 2.5 in. Statistical data indicate a standard deviation of compressive strength of 250 psi is expected (more than 30 samples). Only air entrained is allowed. Available Materials Air entrainer: Manufacture specification is 0.15 fl oz/1% air/100 lb cement. Aggregate:...
I mention everything in detail (Concrete mix design) INTRODUCTION TO REINFORCED CONCRETE
I mention everything in detail (Concrete mix design) INTRODUCTION TO REINFORCED CONCRETE
Q 1: Design a concrete mix for the following performances and ingredients: * Compressive strength at...
Q 1: Design a concrete mix for the following performances and ingredients: * Compressive strength at 28 days = 32 MPa, slump 80 mm * Crushed coarse aggregate of max size 20 mm readily available * Fine aggregate is river sand, fineness modulus = 2.5 * Cement Strength Class = 42.5 * Specific gravity of combined aggregate =2.6 * Water absorption of coarse aggregate = 0.8% * Water absorption of fine aggregate = 0.5% Q 2: Design a concrete mix...
Design the concrete mix according to the following conditions: Design Environment Pavement slab, Bozeman, Montana (cold...
Design the concrete mix according to the following conditions: Design Environment Pavement slab, Bozeman, Montana (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/100lb cement Coarse aggregate: 2in. nominal maximum size, crushed stone Bulk oven dry specific gravity = 2.573, absorption =...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT