Coarse Aggregate: well-graded % in. nominal maximum-size aggregate (NMSA), crushed limestone, angular Oven-dry specific gravity: 2.65 Absorption: 1.70% Oven-dry rodded bulk density: 101 lb/ft³ Moisture content of coarse stockpile: 2.21% Fine Aggregate: well-graded natural sand Oven-dry specific gravity: 2.55 Absorption: 1.6% Moisture content of fine stockpile: 2.4% Fineness Modulus: 2.4 Following the ACI 211.1-95 procedure, design a concrete mixture that meets the following criteria: A concrete that will be used for a reinforced concrete wall. The thickness of the wall is 8 inches. The minimum distance between rebar will be 3 in. The cover of the concrete over the rebar will be 1.5 inches. A required slump of 6 inches An exposure condition that includes no sulfates, but regular freezing action, but the concrete element will not be continually exposed to moisture or deicing chemicals A required compressive strength of 5000 psi. Your concrete wall will be 28 feet long, 10 inches thick, and 13 feet tall. Calculate the following a) The theoretical dry batch weights for a concrete mixture of a size of 1 cubic yard. b) The moisture content adjusted batch weights for a concrete mixture of a size of 1 cubic yard. c) The batch weights required to cast the entire wall.
Coarse Aggregate: well-graded % in. nominal maximum-size aggregate (NMSA), crushed limestone, angular Oven-dry specific gravity: 2.65 Absorption: 1.70% Oven-dry rodded bulk density: 101 lb/ft³ Moisture content of coarse stockpile: 2.21% Fine Aggregate: well-graded natural sand Oven-dry specific gravity: 2.55 Absorption: 1.6% Moisture content of fine stockpile: 2.4% Fineness Modulus: 2.4 Following the ACI 211.1-95 procedure, design a concrete mixture that meets the following criteria: A concrete that will be used for a reinforced concrete wall. The thickness of the wall is 8 inches. The minimum distance between rebar will be 3 in. The cover of the concrete over the rebar will be 1.5 inches. A required slump of 6 inches An exposure condition that includes no sulfates, but regular freezing action, but the concrete element will not be continually exposed to moisture or deicing chemicals A required compressive strength of 5000 psi. Your concrete wall will be 28 feet long, 10 inches thick, and 13 feet tall. Calculate the following a) The theoretical dry batch weights for a concrete mixture of a size of 1 cubic yard. b) The moisture content adjusted batch weights for a concrete mixture of a size of 1 cubic yard. c) The batch weights required to cast the entire wall.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:The following materials are available for a concrete mixture design:
- ASTM C 150 Type I/II Cement
- Relative density of 3.15
Transcribed Image Text:**Concrete Mix Design for Reinforced Wall Construction**
**Coarse Aggregate:**
- Type: Well-graded ¾ in. nominal maximum-size aggregate (NMSA), crushed limestone, angular
- Oven-dry specific gravity: 2.65
- Absorption: 1.70%
- Oven-dry rodded bulk density: 101 lb/ft³
- Moisture content of coarse stockpile: 2.21%
**Fine Aggregate:**
- Type: Well-graded natural sand
- Oven-dry specific gravity: 2.55
- Absorption: 1.6%
- Moisture content of fine stockpile: 2.4%
- Fineness Modulus: 2.4
**Design Criteria (Following ACI 211.1-95 procedure):**
- The concrete will be used for a reinforced concrete wall with:
- Wall thickness: 8 inches
- Minimum distance between rebar: 3 inches
- Cover of concrete over rebar: 1.5 inches
- Required slump: 6 inches
- Exposure condition: No sulfates, regular freezing action, not continuously exposed to moisture or deicing chemicals
- Required compressive strength: 5000 psi
- Wall dimensions: 28 feet long, 10 inches thick, 13 feet tall
**Calculation Requirements:**
1. Calculate the theoretical dry batch weights for a 1 cubic yard concrete mixture.
2. Adjust the batch weights for moisture content for a 1 cubic yard concrete mixture.
3. Determine the batch weights for casting the entire wall.
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Step 1 Find Compressive strength and water - cement ratio
VIEWStep 2 Find Water content
VIEWStep 3 Find Cement content
VIEWStep 4 Find Coarse aggregate
VIEWStep 5 Fine aggregate
VIEWStep 6 Adjusted weight of Aggregate due to mositure content MC
VIEWStep 7 Adjusted weight of water due to absorption capacity AC
VIEWStep 8 Final mix design for 1 cubic yard of concrete
VIEWStep 9 Calculate mix design for RCC wall
VIEW
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