Precast concrete materials, manufacture, properties and usage - Chapter 1 pdf
Precast concrete materials, manufacture, properties and usage - Chapter 1 pdf
... relevant
to precast concrete manufacture leaving mix design to Chapters 5 and 6.
1. 5 .1 Cement types
The most common cements used are ordinary and rapid-hardening
Portland (including white), sulphate-resisting ... with
dimensional stability it pays to use hardwood. Table 1. 1 lists typical
woods used for precast concrete mould manufacture.
Fig. 1. 4. Cess tank unit.
TABLE 1....
Precast concrete materials, manufacture, properties and usage - Chapter 8 pdf
... show:
10 min 30 min 1h
Non-air-entrained 0·50 0·30 0·20
Air-entrained 0·40 0·05 0· 01
Fig. 8 .18 . Defective kerbs with only partial replacement.
Copyright Applied Science Publishers Ltd 19 82
8.5.3 ... difference
between 10 00 t travelling at 0·1km/h and 10 g travelling at 15 00 km/h.
8.5 .13 Wear
Although there are a few National Standards there has been little
progress, as at 19 8...
Precast concrete materials, manufacture, properties and usage - Chapter 0 pot
... TA683·7
ISBN 0-2 0 3-4 905 7-6 Master e-book ISBN
ISBN 0-2 0 3-7 988 1- 3 (Adobe eReader Format)
ISBN 0-8 533 4-9 9 4-0 (Print Edition)
WITH 40 TABLES AND 10 9 ILLUSTRATIONS
© APPLIED SCIENCE PUBLISHERS LTD 19 82
All ... Publishers Ltd 19 82
PRECAST CONCRETE
Materials, Manufacture,
Properties and Usage
M.LEVITT
ARCS, BSc, DIC, PhD
Head—Mate...
Precast concrete materials, manufacture, properties and usage - Chapter 2 pot
... Science Publishers Ltd 19 82
It can be seen that the best results are obtained with a low C3A
cement, and ordinary Portland cements with levels of C3A well under
10 % and sulphate-resisting cements ... as
Copyright Applied Science Publishers Ltd 19 82
2
ADMIXTURES
This chapter covers the range of admixtures used in precast concrete
products and mortars used with precast m...
Precast concrete materials, manufacture, properties and usage - Chapter 3 ppsx
... concrete colour
Both the desk-top 10 0mm square sample and the 300mm square hand-
portable samples are misleading in the case of unpigmented materials,
and for coloured concretes and mortars they seldom ... and 1% by weight of cement of stearic
acid powder is generally sufficient for most concretes. For mortars a
concentration of 1 5–2·0% is required and for earth-moist mix s...
Precast concrete materials, manufacture, properties and usage - Chapter 4 pot
... only one fly ash and F2 was selected. The
works mix was a 3 /1 by weight sand/ordinary Portland cement mix with
a sand grading:
Sieve No. Passing %
1 18 mm 10 0
600 µm 95
300 µm 50
15 0 µm 5
The following ... ratio of
1/ 1 by weight. Such concretes can suffer from long-term internal sulphate
attack even though all their other properties may be acceptable. This is
shown in Fig. 4 .1...
Precast concrete materials, manufacture, properties and usage - Chapter 5 ppt
... conditions.
13 . Re-vibration of concrete is beneficial if the concrete is re-vibratable
and the cost of double handling moulds or vibrators is economical.
14 . Properly designed concretes cannot be over-vibrated. ... accurate and consistent quantity of
concrete into the mould.
In some precast processes tilting tables are used both to cast the
concrete and lift the mould an...
Precast concrete materials, manufacture, properties and usage - Chapter 6 pptx
... material to a high
pressure and temperature (e.g. 11 15 bar at 18 0– 210 °C for 10 18 hours)
an autoclave-induced chemical reaction occurs resulting in the formation
of mono-calcium silicate.
The basic ... freezing and thawing and the use of de-icing chemicals. A
typical mix design could be:
2·7 parts of 10 mm hard stone or crushed rock
1 5 parts of natural sand or sand-graded
crus...
Precast concrete materials, manufacture, properties and usage - Chapter 7 pptx
... 19 66.
CP 11 0, The structural use of concrete, Pt. 1, Materials and workmanship, BSI,
19 72.
B.SADGROVE, Technical Note No. 12 , Construction Industry Research and
Information Association, UK, 19 70.
Copyright ... gravel 1 1
Concrete Limestone 0·74 Flint gravel 1 3
The following typical data illustrate the importance of both the E-values
Copyright Applied Science Publishers L...
Precast concrete materials, manufacture, properties and usage - Chapter 9 ppt
... undertaken at 14 –28 days old on units covered for the
previous 3 days.
Day of casting no. 10 min 30 min 1 h
1 0·20 0 12 0·09
2 0 10 0·07 0·05
3 0 13 0·08 0·06
4 0·09 0·06 0·04
5 0·37 0·20 0 16
6 0·09 ... precast
concrete operations.
Example 1: Dimensions of cladding unit ex-mould No. 3 where
specifications are:
x=3 015 +0 10
y=2550+0 10
z =15 0+3–3
(all in mm)
Copyright Appli...
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