Selected tests for determining the volume-change characteristics of certain Wyoming concrete aggregates

169 Pages·06.299 MB·English

by  Landgren, Robert

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This thesis, having been approved by the
special Faculty Committee, is accepted
by the Graduate School of the
University of Wyoming,
in partial fulfillment of the requirements
for the degree o/--Maatfin_af__Scifinc.e___
— _____________
Dean of the Graduate School.
Date. August _17jl_1251
Reproduced with permission of the copyright owner. Further reproduction prohibited without permission.
Reproduced with permission of the copyright owner. Further reproduction prohibited without permission.
SELECTED TESTS FOR DETERMIWIEG THE VOLUME-
CHAHGE CHARACTERISTICS OF CERTAIV VTCMIRG
COICRETB AGGREGATES
BY
Robert Landgren
A Thesis
Sumitted to the Department
of Civil and Arohiteotural Engineering
and the Graduate Sohool of the University of Wyoming
in P artial Fulfillm ent of Requirements
for the Degree of Master of Soienoe
l ib r a r y
o f The
UNIVERSITY OF WYOMING
LARAMIE
University of Wyoming
Laramie* Wyoming
Augus£, 1951
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UMI Number: EP20545
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11
hebard ROOM
ACKNOWLEDGMENT
Tha Ideal Canant Company adopted in 1947 the polioy of giving fel-
\
lowship grants at tha instigation of Mr. Charles Boettoher. Tha moti­
vating prinoipla of tha Charles Boettoher Fellowship was the desire to
be of assistanoe to students engaged in research activities on portland
oemsnt concrete.
The author sincerely wishes to thank the Ideal Cement Company fbr
the generous funds granted under the Charles Boettoher Fellowship a t
the U niversity of Wyoming. Without this Monetary and m aterial aide,
the thesis oould not have been undertaken.
Dr. H. S. Sweet, A ssistant Professor of Civil Ingineering, faoulty
advisor and the thesis director, supervised the preliminary work, re­
viewed the manusoript, and furnished help and enoouragement through the
investigation.
Dr. Fisk, direotor of the Vational Resources Research Institute of
the University and Mr. Ted Jones of the Monolith Cement Company gener­
ously lent their equipment at various stages of the work.
Many other persons gave unselfishly of their time and m aterials to­
ward the completion of the various projects.
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ill
TABLE OF CONTENTS
CHAPTER PAGE
I . INTRODUCTION............................................................................................ 1
II. HISTORY AND REVISE OF LITERATURE............................................... 3
Alkali-Aggregate Reaotion ........................................................ 3
General Discussion . . . . . . 3
Hortar Bar T e s t ..................................................................... 12
Osmotic Pressure T e s t ........................................................ 14
Petrographic Analysis ........................................................ 16
Miscellaneous T e s ts ............................... 16
Volume Changed Due to Calcium and Magnesium Compounds
in Cement................................................................................................. 17
Notes on Calcium Hydroxide............................................... 17
Autoolave Type Expansion.................................................. 18
D isintegration Due to Aoid Action in Mater . . . 21
Heating and Cooling T e s t................................................... 23
Vetting and Drying Test ..................................... 25
/
III. MATERIALS AND FABRICATION OF SPECIMENS................................. 28
Cements........................... 28
Fine Aggregates . . . . . ................... . . . . . . . . . 30
, Coarse Aggregates .......................................................................... . 30
Fabrication of Concrete Speoimen6 .......................................... 35
Mortar Bar Fabrication ................................................................. 40
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iv
CHAPTER PAGE
IV. TEST PROCEDURES AND EQUIPMENT .................................................. 42
Alkali-Aggregate Reaction Tests ............................ . . . . 42
Mortar Bar and Conrow Tests . . . . . ................... 42
Osmotio Pressure Test ..................................... 45
Petrographio Analysis . ............................................... 51
Tests Relating to the Caloium and Magnesium Content
of the Cement........................................................................................ 53
Wetting and Drying Test ........................ . . . . . . 54
Thermal Shook T e s t................................................................. 56
Slow-Heat-and-Cool T e s t .............................................. .
V. RESULTS AND DISCUSSION..................................................................... 67
Alkali-Aggregate Reaction ............................................. 68
Mortar Bar and Conrow Procedures................................. 68
Petrographio Analysis ........................................................ 85
Osmotio Pressure T e sts.................................... 87
Volume Changes Due to Caloium and Magnesium Compounds
in Cement................................................................................................. 91
Thermal Shoek Test ............................................................ 91
Slow-Heat-and-Cool T e s t ................................................... 1£A
Wetting and Drying T e s t ................................................... 130
VI. CORRELATION OF LABORATORY RESULTS AND FIELD PERFORMANCE
OF THE TESTED AGGREGATES................................................................. 142
V II. CONCLUSIONS................................................................................................ 150
BIBLIOGRAPHY .......................................................................................................... 153
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V
LIST OF TABLES
TABLE PAGE
I. Chemical Analyses of C em ents........................... 29
II s Sieve Analyaie of Fine Aggregates ........................................... 31
III. Fine Aggregate Physical Properties . . . . . . . . . 32
IVo Coarse Aggregate Physioal Properties .................................. 34
V. Concrete Mix D ata....................................................... 39
VI. Petrographio Analysis of Fine Aggregate in Percentage
of the Total P a rtio le s .................................... 86
VII. Relative Beam Expansions in the Thermal Shook Test. . 100
V III. lficrosoopio Analysis of Thermal Shook Exudate . . . . 101
IX. Comparison of D urability Data for Field and Laboratory
T e sts............................................................................. 148
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