Concrete is required for a column that will be Severe Exposure to freezing and thawing. The cross section of the column is 300 × 300 mm. The smallest spacing between reinforcing steel is 40 mm. The specified compressive strength of concrete at 28 days is 40 MPa with a slump of 25 to 50 mm. The properties of materials are as follows: (a) Cement used is type I Portland cement with a specific gravity of 3.10. (b) The available coarse aggregate has a maximum size of 23 mm, a dry-rodded unit weight of 1800 kg/m3, a bulk specific gravity (SSD) of 2.68, absorption capacity of 0.65%, and moisture content (SSD) of 0.27%. (c) The fine aggregate has a bulk specific gravity (SSD) of 2.75, absorption capacity of 1.5%, a moisture content (SSD) of 2.5%, and a fineness modulus of 2.7 ,The aggregates conform to the ASTM C33-84 requirements for grading.
Concrete is required for a column that will be Severe Exposure to freezing and thawing. The cross section of the column is 300 × 300 mm. The smallest spacing between reinforcing steel is 40 mm. The specified compressive strength of concrete at 28 days is 40 MPa with a slump of 25 to 50 mm. The properties of materials are as follows: (a) Cement used is type I Portland cement with a specific gravity of 3.10. (b) The available coarse aggregate has a maximum size of 23 mm, a dry-rodded unit weight of 1800 kg/m3, a bulk specific gravity (SSD) of 2.68, absorption capacity of 0.65%, and moisture content (SSD) of 0.27%. (c) The fine aggregate has a bulk specific gravity (SSD) of 2.75, absorption capacity of 1.5%, a moisture content (SSD) of 2.5%, and a fineness modulus of 2.7 ,The aggregates conform to the ASTM C33-84 requirements for grading.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Concrete is required for a column that will be Severe Exposure to freezing and
thawing. The cross section of the column is 300 × 300 mm. The smallest spacing
between reinforcing steel is 40 mm. The specified compressive strength of concrete
at 28 days is 40 MPa with a slump of 25 to 50 mm. The properties of materials are as
follows:
(a) Cement used is type I Portland cement with a specific gravity of 3.10.
(b) The available coarse aggregate has a maximum size of 23 mm, a dry-rodded unit
weight of 1800 kg/m3, a bulk specific gravity (SSD) of 2.68, absorption capacity of
0.65%, and moisture content (SSD) of 0.27%.
(c) The fine aggregate has a bulk specific gravity (SSD) of 2.75, absorption capacity
of 1.5%, a moisture content (SSD) of 2.5%, and a fineness modulus of 2.7,The
aggregates conform to the ASTM C33-84 requirements for grading.
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