matl_dlg.dcl — Material Specification Configuration

File: matl_dlg.dcl
Version: v3.60
Category: Dialog Definitions
Size: 6.8 KB (205 lines)

Note

Material Properties

Configure concrete mix specifications, strength requirements, and material properties for engineering calculations, cost estimation, and quality control.

Functional Purpose

Material Specification - Defines concrete mix design, strength requirements, additives, and material properties that affect panel engineering, production, and cost.

Key Functions:

  1. Specifies concrete mix (from library or custom)

  2. Sets compressive strength (PSI or MPa)

  3. Defines unit weight (for load calculations)

  4. Selects additives (air entrainment, accelerators, etc.)

  5. Controls cement type (I, II, III, IV, V)

  6. Manages special requirements (exposure conditions, finishes)

User Need

Material specifications for:

  • Engineering calculations (strength verification, load capacity)

  • Cost estimation (mix cost per cubic yard)

  • Production planning (cure time, form removal schedule)

  • Quality control (test cylinder requirements)

  • Building code compliance (ACI 318, local codes)

  • Durability (freeze-thaw, sulfate resistance, etc.)

Typical Workflow

1. User in configuration menu or mp_dlg selects [Materials]
2. matl_dlg opens
3. User selects mix from library OR creates custom
4. Standard mix selected: "5000 PSI Normal Weight"
5. Properties auto-populated:
   • Strength: 5000 PSI (f'c)
   • Unit weight: 145 PCF
   • Cement: Type I
   • Slump: 4-6"
6. User adds requirements:
   • Air entrainment: 6% (freeze-thaw protection)
   • Water reducer: Yes (higher strength)
7. User adds special notes: "7-day strength test required"
8. User clicks OK
9. Material properties saved to project
10. Used in all panels unless overridden

Control Semantics

Primary Controls

Mix Selection:

  • mtm - Mix design dropdown (from library):

    • 3000 PSI Normal Weight

    • 4000 PSI Normal Weight (common residential)

    • 5000 PSI Normal Weight (most common structural)

    • 6000 PSI Normal Weight (high-strength)

    • 8000 PSI High-Strength

    • Lightweight mixes (100-120 PCF)

    • Custom (user-defined)

Strength:

  • mts - Compressive strength (f’c):

    • PSI (US): 3000, 4000, 5000, 6000, 8000

    • MPa (metric): 20, 28, 35, 42, 55

    • 28-day strength (standard)

    • Special: 7-day, 56-day, 90-day

Unit Weight:

  • mtu - Density (pounds per cubic foot):

    • Normal weight: 145-150 PCF (most common)

    • Lightweight: 100-120 PCF (structural lightweight)

    • Sand-lightweight: 120-135 PCF

    • Heavy weight: 160+ PCF (radiation shielding)

Cement Type:

  • mtc - Portland cement type (ASTM C150):

    • Type I - General purpose (most common)

    • Type II - Moderate sulfate resistance

    • Type III - High early strength (cold weather)

    • Type IV - Low heat of hydration (mass concrete)

    • Type V - High sulfate resistance (soil exposure)

    • Blended cements (Type IP, IS, etc.)

Additives/Admixtures

Chemical Admixtures:

  • mta - Admixture checkboxes:

    • Air entrainment (AE):

      • Freeze-thaw protection (4-7% air)

      • Required for exterior exposure in cold climates

    • Water reducers (WR):

      • Normal: 5-10% water reduction

      • Mid-range: 10-15% reduction

      • High-range (superplasticizer): 15-30% reduction

    • Accelerators:

      • Calcium chloride (2% max - corrosion risk)

      • Non-chloride accelerators (preferred)

      • Faster strength gain, earlier form removal

    • Retarders:

      • Slow setting time (hot weather)

      • Extend workability period

    • Corrosion inhibitors:

      • For chloride environments

      • Parking structures, marine exposure

Fiber Reinforcement:

  • mtf - Fiber type (supplementary):

    • Synthetic macro fibers (plastic)

    • Steel fibers (dosage: 40-100 lbs/CY)

    • Glass fibers (GFRC)

    • Not replacement for rebar!

Special Requirements

Exposure Class:

  • mte - Environmental exposure (ACI 318):

    • F0: Not exposed to freeze-thaw

    • F1: Exposed, not saturated

    • F2: Exposed, continuously moist

    • F3: Exposed, with de-icing chemicals

    • S0: Not exposed to sulfates

    • S1-S3: Increasing sulfate exposure

Finish Class:

  • mtfin - Surface finish requirement:

    • Class A: Smooth architectural (form-faced)

    • Class B: Textured (sandblast, etc.)

    • Class C: Rough (as-cast acceptable)

    • Special: Integral color, stain, etc.

Slump:

  • mtsl - Workability (inches):

    • 2-4”: Stiff (foundations, mass concrete)

    • 4-6”: Standard (typical precast)

    • 6-8”: High slump (complex forms)

    • 8-10”: Flowing (with superplasticizer)

Engineering Impact

Strength Effects

f’c = 5000 PSI:

Flexural strength: ~7.5?f'c = 7.5?5000 = 530 PSI
Shear strength: ~2?f'c = 2?5000 = 141 PSI
Modulus of elasticity: 57,000?f'c = 57,000?5000 = 4,031,000 PSI

Higher strength = 
? Thinner sections possible
? Higher load capacity
? Better durability
? Higher cost
? More shrinkage/cracking risk

Weight Effects

145 PCF normal weight:

12' × 8' × 6" panel:
Volume = 12 × 8 × 0.5 = 48 CF
Weight = 48 × 145 = 6,960 lbs (concrete only)
Add rebar, embeds: ~10% = 770 lbs
Total panel weight: 7,730 lbs

Affects:
- Lifting insert capacity requirements
- Transportation limits
- Erection crane size
- Foundation bearing capacity

120 PCF lightweight:

Same panel:
Volume = 48 CF
Weight = 48 × 120 = 5,760 lbs (concrete only)
Add rebar/embeds: 770 lbs
Total: 6,530 lbs

Savings: 1,200 lbs (15% lighter!)

Benefits:
? Smaller crane required
? Lower foundation loads
? Easier handling
? Higher cost (~$20-40/CY more)
? Lower strength (typically 4000 PSI max)

Cost Impact

Typical Mix Costs (2024):

3000 PSI: $100-120/CY
4000 PSI: $110-130/CY
5000 PSI: $120-140/CY
6000 PSI: $130-150/CY
Lightweight: $140-180/CY

Admixtures add:
Air entrainment: $2-5/CY
Water reducer: $3-8/CY
Accelerator: $5-12/CY
Superplasticizer: $8-20/CY

User Example

Scenario: Parking structure panels (harsh environment)

1. User: Opens matl_dlg
2. Project type: Parking structure (de-icing salts, freeze-thaw)
3. Mix selection: "5000 PSI Normal Weight"
4. Properties:
   • Strength: 5000 PSI
   • Unit weight: 145 PCF
   • Cement: Type II (moderate sulfate resistance)
5. Admixtures:
   • Air entrainment: 6% ? (freeze-thaw)
   • Water reducer: Yes ? (workability + strength)
   • Corrosion inhibitor: Yes ? (de-icing salts)
6. Exposure class: F3 (freeze-thaw + de-icing)
7. Special requirements:
   • 56-day strength test
   • Chloride permeability test (ASTM C1202)
   • Minimum 7-day moist cure
8. Notes: "Use calcium nitrite corrosion inhibitor, 10 gal/CY"
9. Result: Durable mix specified for 50+ year life in harsh environment

Integration

Called By: Configuration menu, project setup Variables:

  • mix-design - Mix identification

  • fc - Compressive strength

  • unit-weight - Density (PCF)

  • cement-type - Portland cement type

  • admixtures - List of admixtures

  • exposure-class - ACI 318 classification

  • special-notes - Custom requirements

Used By:

  • Engineering calculations (strength verification)

  • Cost estimation (material costs)

  • Quality control (test cylinder schedule)

  • Production (batch plant tickets)

Best Practices

Mix Selection:

  • ? Use standard mixes when possible (cost, availability)

  • ? 5000 PSI most common structural

  • ? Air entrainment for exterior (freeze-thaw)

  • ? Consider environment (sulfates, chlorides)

Strength:

  • ? Don’t over-specify (higher cost, more cracking)

  • ? 5000 PSI adequate for most applications

  • ? 6000+ PSI only if structurally required

Admixtures:

  • ? Air entrainment: Always for exterior in cold climates

  • ? Water reducer: Improves workability and strength

  • ?? Accelerators: Avoid chloride-based (corrosion)

Documentation Metadata

Enhancement Status: ? COMPREHENSIVE - ENHANCED [2/8]

End of Document