WSP01505

• File Number: 8220.200.05.J
• Description: Hoover Dam/Lake Mead/Boulder Canyon Project
• Basin: Colorado Mainstem
• Date: 1/1/1949
• Author: USDOI/BOR
• Title: Boulder Canyon Project Final Reports: Part VII/ Bulletin 4 - Mass Concrete Investigations
• Water Supply Pro - Doc Type: Report/Study

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CONTENTS

XI

CHAPTER III-PERMEABILITY TESTS

BRIEF DESCRIPTION OF MATERIALS. APPARATUS, AND PROCEDURES
Seation Page
52 MateriaLnnn _ n __ nn n_nn____n___ ________________n___ 67
53 Mixing and curing__u__________n________________n__________ 67
54 Apparatus__________________________________________~____~~__ 68
55 Procedures___________________________________________________ 68

THEORETICAL CONSIDERATIONS

Laws of flow_ ___ __ __ __ ____ ____ ____________ ___________________ 69
Flow through concretc_____________________________uh____n__ 70
Nomenclature___ __ __ __ _ _ __ ____ __ ____ ________.________________ 71
Permeability coefficients______ _ _ _ ___ _ _ _ _ ___ _ __ ________ _________ 74

TEST RESULTS
Tabular results____ _ _ __ _ _ _ _ __ _ _ _ __ _ _ _ __ ___ __ _ __ ____________ ___ 75
Accuracy____________________________________________________ 75
Effect of pressure_____ _ _______________________________________ 79
Effect of age of specimen___u_________n__u_un__________n. 82
Effect of end condition of specimen_______n___u_u_________n_ 83
Typical test results_u__________un____n___u_u_uun__u~ 85
Effect of cement___u____u_u_uu__nn_u__________________ 87
Effect of water-cement ratiOn u _ u_ ____ uu__ _u_nhunn_n 89
Effect of maximum size of aggregate_n____nn____uu_________ 89
Effect of the compaction method used____u____u________h_hn 92
Effect of direction of pressure applicationn__-'__h________nn___ 92
Effect of workability___ ______________________ ___hh_h_______ 94
Effect of paste contentu___h__h_n_U____u________u_un__ 94
Effect of type of curing____-___~_____uh___'h:_____un__un_h 94
Effect of interrupted curing.:____u..:.___u____unn_u________u 95
Corrosion_n _ __ _____ __ _ ___ ____________ __ ______ ____n_______h 96
Miscellaneous relationships_ _ ___ _ _________________ ______ _______ 99
Permeability of Hoover Dam concrete____nu_u_u___u________ 101
Application of the coefficients_______uu__________hU__hh___ 101
Coefficients for other materials_ _ _ ___ ____ ___U__h__unUu_u_ 101
Limitations of the test results__n____n_____unuu_u_uun_ 103
ConclusioDB__________________________________________________ 104

CHAPTER IV-BOND AT CONSTRUCTION JOINTS

INTRODUCTION

Purpose of inve.stigationn__ __ ___ ___________ _______U____h____ 107
Principal findingsn _ ~ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ _ _ _ _ u _ _ _ _ n _ _ _ 108
Acknowledgment and personneL _ _ ___ _ __ uun __u____ __h__ ___ 108

MATERIALS AND CONCRETE MIXES

Aggreg'te___________________________________________________ 108
Cement and water n __ _ n __ u n _ _ _ u _ _ _ __ _ _ _ _ __ _ u _ u _ _ __ u _ u 108
Mix proportions and test grOupSnn _ __ u u __ _ __ u _ u n _ _ u _ __ u 109
1fixing______________________________________________________ 112