Annex A (informative)

Typical compositions for plastic concrete and plastic mortar

Typical compositions using bentonite, for one m3, are as follows:

— plastic concrete:

water: 400 l to 500 l
cement or binder: 50 kg to 200 kg
aggregates: 1 200 kg to 1 500 kg
sodium bentonite: 12 kg to 30 kg

or

calcium bentonite: 30 kg to 90 kg

or

clay: 30 kg to 250 kg

— plastic mortar:

water: 400 I to 750 I
cement: 80 kg to 300 kg
sand: 500 kg to 1 000 kg
sodium bentonite: 20 kg to 50 kg

or

calcium bentonite: 40 kg to 100 kg

or

clay: 40 kg to 350 kg

Annex B (informative)

Sample site record forms for diaphragm walls

Tables B.1 to B.11 present samples of the general and detailed information sheets for the various types of diaphragm walls:

  • Tables B.1 and B.2 for cast in situ diaphragm walls;
  • Tables B.3, B.4 and B.5 for precast concrete diaphragm walls;
  • Tables B.6 and B.7 for reinforced slurry walls;
  • Tables B.8 and B.9 for slurry cut-off walls;
  • Tables B.10 and B.11 for plastic concrete cut-off walls.
Table B.1 — Example of general form for cast in situ diaphragm walls
General information sheet for the execution of cast in situ diaphragm walls
Company name
 		 Client
Site information
Job No.:
Location:
 
Key drawings Reference No. Title  
 
 
Concrete information
Origin: Ready mix □
Mixed on site □
Ready mix plant
Concrete classification
Composition (mix for 1 m3)
Cement
Water
Aggregates		 (kg)
(kg)
(kg)
Additions
Admixtures		 (kg)
(kg)
Slump
Flow table value
Compressive strength (28 days)		  
(mm)
(MPa)
Notes
Supporting fluid information
(in the case of bentonite suspension)
 
Characteristics (specified range) 
Fluid loss (30 min):
Filter cake:
pH:
Density:
Marsh value:
Shear strength:
(when required)		 (ml)
(mm)
 
(g/ml)
(s)
(Pa)
Notes
Table B.2 — Example of detailed form for cast in situ diaphragm walls
Detailed information sheet for the execution of cast in situ diaphragm walls
Panel information
Reference No.: Type:
Levels
Guide-wall
Working platform
 
Ground profile
(including water levels)
Excavation
Geometry (attach sketch if necessary)
Width: (m)
Length: (m) Depth: (m)
Date and time
Start: Date: Time:
 
Finish: Date: Time:
Equipment used
 
 
Obstructions Date/Time
Depth Start Finish
 
Loss of supporting fluid   Time
Depth Volume Start Finish
 
Chiselling Time
Depth Start Finish
 
Delays Time
Depth Start Finish Reason(s)
 
Verticality and twist
 
 		 Notes
Supporting fluid characteristics
Type
Parameters before concreting
Density
Marsh value
Sand content
Cleaning of excavation
Start:
 		 Date: Time:
Finish:
 		 Date: Time:
Depth of panel (at least 3 locations):
Location Depth  
Reinforcement caqe(s)
Identification No.
 
Drawing No.
Type
 
Placement: Date:
Time:
Notes
 
Panel joints
Type
 		 Dimensions (if applicable)
Concreting
Date:
Time: Start: Finish:
Volume (attach concreting curve if required)
Theoretical
Actual		 (m3)
(m3)
Levels: Top of concrete (m)
  Cut-off (m)
Concrete consistency tests
□ Slump □ Flow table value
Interruptions Time    
Depth Start Finish Reason (s)
Additional notes
 
 
Signatures and comments
 
Contractor:
Client:		 Date:
Date:		 (signature)
(signature)
 
Table B.3 — Example of general form for precast concrete diaphragm walls
General information sheet for the execution of precast concrete diaphragm walls
Company name
 		 Client
Site information
Job No.:
Location:
 
Key drawings Reference No. Title  
 
 
Concrete information
Origin: Ready mix □
Mixed on site □
Ready mix plant
Concrete classification
Composition (mix for 1 m3)
Cement
Water
Aggregates
 		 (kg)
(kg)
(kg)
Admixtures
Additions
 		 (kg)
(kg)
Compressive strength (28 days) (MPa)
Notes
Supporting fluid information
□ I. Bentonite suspension replaced by self-hardening slurry (complete information for cases A and B)
□ II. Self-hardening slurry only (complete information for case B)
Note: The "detailed information sheet" to be used depends on the execution technique (Option I or II)
A. Bentonite suspension

 Characteristics (specified range)
 
Fluid loss (30 min):
Filter cake:
pH:
Density:
Marsh value:
Shear strength:
(when required)		 (ml)
(mm)
 
(g/ml)
(s)
(Pa)
B. Self-hardening slurry

 Characteristics (specified range)
 
Bleeding:
Compressive strength
(at 28 days)
(other duration)
Marsh value:		 (%)
 
(MPa)
(MPa)
(s)
Table B.4 — Example of detailed form (Option I) for precast concrete diaphragm walls
Detailed information sheet for the execution of precast concrete diaphragm walls
(Option I: Bentonite suspension replaced by self-hardening slurry)
Element information
Reference No.: Type:
Levels
Guide-wall
Working platform
 
Ground profile
(including water levels)
Excavation
Geometry (attach sketch if necessary)
Width: (m)
Length: (m)
Depth: (m)
Length of trench beyond end
of last element: (m)
Date and time
Start: Date: Time:
 
Finish: Date: Time:
Equipment used
 
 
Obstructions Date/Time
Depth Start Finish
 
Loss of supporting fluid   Time
Depth Volume Start Finish
 
Chiselling Time
Depth Start Finish
 
Delays Time
Depth Start Finish Reason(s)
 
Verticality and twist
 
 		 Notes
Supporting fluid characteristics
Bentonite suspension
Type
Ready for reuse
Fluid loss
Filter cake
pH
Density
Marsh value
Shear strength
(when required)		 Before substitution of self-hardening slurry
Density
Marsh value
Sand content
Self-hardening slurry
Type
After substitution
Density
Marsh value
Setting time
Bottom filling mortar (if any)
Cleaning of excavation
Start:
 		 Date: Time:
Finish:
 		 Date: Time:
Reinforcement caqe(s) and jointsIdentification No.:
Drawing No.:
Number of cages:
Number of joints:
Type of waterstop (if any)
 
Placement: Date:
Time:
Notes
 
Precast element information
Identification No.
 
Dimensions
Length
Width
Thickness		  
(m)
(m)
(m)
Concreting of element
Pour: Date: Time:
     
Form removal: Date: Time:
     
Date out in storage:
Volume (m3)
Concrete strength
(before storage)		 (MPa)
Element installation
Date element lowered into trench:
 
Locations of element ends
Theoretical
Actual
Spaces between two adjacent elements		 Levels
Guide wall (each end)
before installation
after installation
 
Top of each reference bar connected to element
(after installation)
Additional notes
 
 
Signatures and comments
 
Contractor:
Client:		 Date:
Date:		 (signature)
(signature)
 
Table B.5 — Example of detailed form (Option II) for precast concrete diaphragm walls
Detailed information sheet for the execution of precast concrete diaphragm walls
(Option II: Self-hardening slurry only)
Element information
Reference No.: Type:
Levels
Guide-wall
Working platform
 
Ground profile
(including water levels)
Excavation
Geometry (attach sketch if necessary)
Width: (m)
Length: (m)
Depth: (m)
Length of trench beyond end
of last element: (m)
Date and time
Start: Date: Time:
 
Finish: Date: Time:
Equipment used
 
 
Obstructions Date/Time
Depth Start Finish
 
Loss of supporting fluid   Time
Depth Volume Start Finish
 
Chiselling Time
Depth Start Finish
 
Delays Time
Depth Start Finish Reason(s)
 
Verticality and twist
 
 		 Notes
Supporting fluid characteristics
Self-hardening slurry
Type
Fresh slurry
Density
Marsh value
Setting time
Bleeding		 Slurry taken from excavation
Density
Marsh value
Setting time
Bleeding
 
Bottom filling mortal (if any)
Reinforcement caqe(s) and joints
Identification No.:
Drawing No.:
Number of cages:
Number of joints:
Type of waterstop (if any)
 
Placement: Date:
Time:
Notes
 
Precast element information
Identification No.
 
Dimensions
Length
Width
Thickness		  
(m)
(m)
(m)
 
Concreting of element
Pour: Date: Time:
     
Form removal: Date: Time:
     
Date put in storage:
Volume (m3)
Concrete strength
(before storage)		 (MPa)
Element installation
Date element lowered into trench:
 
Locations of element ends
Theoretical
Actual
Spaces between two adjacent elements		 Levels
Guide wall (each end)
before installation
after installation
 
Top of each reference bar connected to element
(after installation)
Additional notes
 
 
Signatures and comments
 
Contractor:
Client:		 Date:
Date:		 (signature)
(signature)
 
Table B.6 — Example of general form for reinforced slurry walls
General information sheet  for the execution of reinforced slurry walls
Company name
 		 Client
Site information
Job No.:
Location:
 
Key drawings Reference No. Title  
 
 
Self-hardening slurry information
 
Characteristics (specified range) 
Density:
Marsh value:
Bleeding:
(when required)
 		 (g/ml)
(s)
(%)
Setting time:
Compressive strength:
(at 28 days)
 		 (min)
(MPa)
Shear strength:
(when required)		 (Pa)
Notes
Table B.7 — Example of detailed form for reinforced slurry walls
Detailed information sheet for the execution of reinforced slurry walls
Excavation section information Chainage: From:
Reference No.: Type: To:
Levels
Guide-wall
Working platform
 
Ground profile
(including water levels)
Excavation
Geometry (attach sketch if necessary)
Width: (m)
Length/day: (m)
Depth: (m)
Amount of overlap (m)
Date and time
Start: Date: Time:
 
Finish: Date: Time:
Equipment used
 
 
Obstructions Date/Time
Chainage Depth Start Finish
Loss of supporting fluid    Time
Chainage Depth Volume Start Finish
 
Chiselling Time
Chainage Depth Start Finish
 		 Verticality and twist
Delays Time  
Chainage Depth Start Finish Reason(s)
Notes
 
 
Supporting fluid characteristics
Type
Fresh slurry
Density
Marsh value
Setting time
Bleeding 

Samples taken
No. Chainage Depth
Slurry taken from excavation
Density
Marsh value
Setting time
Bleeding
 
 
 
Samples taken
No. Chainage Depth
Reinforcement
Identification No.:
 
Drawing No.:
Type
 
Placement: Date:
Time:
Topping up
Settlement of slurry
Volume of slurry added		 (mm)
(m3)
Additional notes
 
 
Signatures and comments
 
Contractor:
Client:		 Date:
Date:		 (signature)
(signature)
 
Table B.8 — Example of general form for slurry cut-off walls
General informationsheet for the execution of slurry cut-off walls
Company name
 		 Client
Site information
Job No.:
Location:
 
Key drawings Reference No. Title  
 
 
Self-hardening slurry information
 
Characteristics (specified range) 
Density:
Marsh value:
Bleeding:
(when required)
 		 (g/ml)
(s)
(%)
Setting time:
Compressive strength:
(at 28 days)
 		 (min)
(MPa)
Shear strength:
(when required)		 (Pa)
Notes
Table B.9 — Example of detailed form for slurry cut-off walls
Detailed information sheet for the execution of slurry cut-off walls
Excavation section information Chainage: From:
Reference No.: Type: To:
Levels
Guide-wall (if any)
Working platform
 
Ground profile
(including water levels)
Excavation
Geometry (attach sketch if necessary)
Width: (m)
Length/day: (m)
Depth: (m)
Amount of overlap (m)
Date and time
Start: Date: Time:
 
Finish: Date: Time:
Equipment used
 
 
Obstructions Date/Time
Chainage Depth Start Finish
Loss of supporting fluid    Time
Chainage Depth Volume Start Finish
 
Chiselling Time
Chainage Depth Start Finish
 		 Verticality and twist
Delays Time  
Chainage Depth Start Finish Reason(s)
Notes
 
 
Supporting fluid characteristics
Type
Fresh slurry
Density
Marsh value
Bleeding
Setting time
(where applicable)
 
Samples taken
No. Chainage Depth
Slurry taken from excavation
Density
Marsh value
Bleeding
Setting time
(where applicable)
 
 
 
Samples taken
No. Chainage Depth
Inserted elements (if any):
Identification No.:
 
Drawing No.:
Type
 
Placement: Date:
Time:
Topping up
Settlement of slurry
Volume of slurry added		 (mm)
(m3)
Additional notes
 
 
Signatures and comments
 
Contractor:
Client:		 Date:
Date:		 (signature)
(signature)
 
Table B.10 — Example of general form for plastic concrete cut-off walls
General information sheet for the execution of plastic concrete cut-off walls
Company name
 		 Client
Site information
Job No.:
Location:
 
Key drawings Reference No. Title  
 
 
Concrete information
Origin: Ready mix □
Mixed on site □
Ready mix plant
Concrete classification
Composition (mix for 1 m3)
Clay material
Cement
 		 (kg)
(kg)
Water
Aggregates
 		 (kg)
(kg)
Additions
Admixtures		 (kg)
(kg)
Slump □
Flow table value □
Compressive strength
Deformation modulus		  
(mm)
(MPa)
(MPa)
Notes
Supporting fluid information
(in the case of bentonite suspension)
 
Characteristics (specified range) 
Fluid loss (30 min):
Filter cake:
pH:
Density:
Marsh value:
Shear strength:
(when required)		 (ml)
(mm)
 
(g/ml)
(s)
(Pa)
Notes
Table B.11 — Example of detailed form for plastic concrete cut-off walls
Detailed information sheet for the execution of plastic concrete cut-off walls
Panel
Reference No.: Type:
Levels
Guide-wall
Working platform
 
Ground profile
(including water levels)
Excavation
Geometry (attach sketch if necessary)
Width: (m)
Length/day: (m)
Depth: (m)
Amount of overlap (m)
Date and time
Start: Date: Time:
 
Finish: Date: Time:
Equipment used
 
 
Obstructions Date/Time
Depth Start Finish
Loss of supporting fluid   Time
Depth Volume Start Finish
 
Chiselling Time
Depth Start Finish
 
Delays Time  
Depth Start Finish Reason(s)
Verticality and twist
 
 		 Notes
Supporting fluid characteristics
Type
Parameters before concreting
Density
Marsh value
Sand content
 Cleaning of excavation
Start: Date: Time:
Finish: Date: Time:
Depth of panel (m)
Concreting:
Date:
Time: Start: Finish:
 		 Volume (attach concreting curve if required)
 
Theoretical (m3)
Actual (m3)
Levels Top of concrete (m)
  Cut-off (m)

Concrete consistency tests:
□ Slump □ Flow table value

Interruptions Time  
Depth Start Finish Reason(s)
 		  
Additional notes
 
 
Signatures and comments
 
Contractor:
Client:		 Date:
Date:		 (signature)
(signature)
 

EN 1538:2000 Execution of special geotechnical works — Diaphragm walls