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Laboratory Session 1 - Concrete Project Lab 1

Concrete Project Lab 1
Course

Structural mechanics (CIV2235)

33 Documents
Students shared 33 documents in this course
Academic year: 2021/2022
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Monash University

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Laboratory Session 1 (Lab1)

The mixer is initially charged with the coarse aggregates, the fine aggregate, and just sufficient of the mixing water to wet the aggregate and the subsequent cement, operated for 30 s, and then stopped. The cement shall then be added. Mixing shall then commence. The balance of mixing water shall be added within 2 min. The mixing sequence shall comprise 2 min mixing, following by 2 min rest, followed by a further 2 min mixing, unless longer periods are found necessary to produce uniformly mixed concrete.

  1. Fresh concrete testing Before the laboratory class, familiarise yourself with:
    • Lecture on Properties of Fresh Concrete
    • Fresh Concrete from the Library Reading List (Chapter 5 of Concrete technology by Neville and Brooks)
    • Australian standards for each particular test described below (can be downloaded from the library website; Standards Australia).

The following tests will be undertaken: (i) Slump Test (carried out according to Australian Standard AS1012, Part 3. Also refer to background provided in the Week 2 Practice Class Guide

(ii) Compacting Factor Test: Compacting factor test shall be carried out according to AS1012, Part 3

(iii) Air Content Test: Air content test shall be carried out according to AS1012, Part 4.

(iv) Density of Freshly Concrete: The test shall be carried out according to AS 1012, Part 5.

  1. Making and Curing Specimen for Compression Test Making and curing test specimens for compression test shall carried according to AS 1012, Part

Please note that the specimens shall be left in their moulds for a period of 18 to 36 hours. Covers shall be used to minimise the loss of moisture from the specimens.

On the following day (after 18 to 36 hours), specimens shall then be taken out of the moulds, and after being marked, for identification (group number and date of casting), shall be placed in the curing tank (lime-saturated water at a temperature of 27 ± 2oC).

  1. Preparation of Concrete Mix in the Laboratory Preparation of concrete mix in the Laboratory shall be carried out according to Australian Standard AS1012, Part 2 (can be downloaded from library website; Standards Australia). The concrete mix batch masses should be calculated to make 0 of concrete. The batch masses need to be adjusted according to the moisture condition of the aggregates (refer to above) Adjusting Mix Proportions for Saturated and Surface Dry Condition of Aggregates).
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Laboratory Session 1 - Concrete Project Lab 1

Course: Structural mechanics (CIV2235)

33 Documents
Students shared 33 documents in this course

University: Monash University

Was this document helpful?
Laboratory Session 1 (Lab1)
The mixer is initially charged with the coarse aggregates, the fine aggregate, and just sufficient
of the
mixing water to wet the aggregate and the subsequent cement, operated for 30 s, and
then stopped.
The cement shall then be added. Mixing shall then commence. The balance of
mixing water shall be
added within 2 min. The mixing sequence shall comprise 2 min
mixing, following by 2 min rest,
followed by a further 2 min mixing, unless longer periods
are found necessary to produce uniformly
mixed concrete.
2.
Fresh concrete testing
Before the laboratory class, familiarise yourself with:
•
Lecture on Properties of Fresh Concrete
•
Fresh Concrete from the Library Reading List (Chapter 5 of Concrete technology by
Neville
and Brooks)
•
Australian standards for each particular test described below (can be downloaded
from the
library website; Standards Australia).
The following tests will be undertaken:
(i) Slump Test (carried out according to Australian Standard AS1012, Part 3.
Also refer to
background provided in the Week 2 Practice Class Guide
(ii) Compacting Factor Test: Compacting factor test shall be carried out according to
AS1012, Part 3
(iii) Air Content Test: Air content test shall be carried out according to AS1012, Part
4.
(iv) Density of Freshly Concrete: The test shall be carried out according to AS 1012,
Part 5.
3.
Making and Curing Specimen for Compression Test
Making and curing test specimens for compression test shall carried according to AS 1012, Part
8.
Please note that the specimens shall be left in their moulds for a period of 18 to 36 hours.
Covers
shall be used to minimise the loss of moisture from the specimens.
On the following day (after 18 to 36 hours), specimens shall then be taken out of the moulds,
and after
being marked, for identification (group number and date of casting), shall be placed
in the curing tank
(lime-saturated water at a temperature of 27 ± 2oC).
1. Preparation of Concrete Mix in the Laboratory
Preparation of concrete mix in the Laboratory shall be carried out according to Australian
Standard AS1012, Part 2 (can be downloaded from library website; Standards Australia).
The concrete mix batch masses should be calculated to make 0.02m3 of concrete. The batch
masses need to be adjusted according to the moisture condition of the aggregates (refer to
above) Adjusting Mix Proportions for Saturated and Surface Dry Condition of Aggregates).

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