MJ2 Consulting, PLLC

Consulting on concrete performance, durability, service life, mixture development, product development, and evaluation of low-carbon concrete claims.

• Concrete Mixture Optimization

  Mixture development balancing constructability, service life, specification conformance, and cost.

• Durability and Service-Life Assessment
• Specialized Concrete Mixture Development
• Reduced/Low Carbon Concrete
• Evaluation of Carbon Negative/Neutral Claims
• Materials Research
• New Product Development

Thermal analysis, thermal control plan development, and specification support for concrete elements classified as mass concrete. Capabilities span 2-D and 3-D thermal modeling, thermal stress analysis, low-adiabatic-rise mixture development, alternative specification limits, and cooling pipe system design including pump and chiller sizing. Staff have guided more than 2,500 mass concrete projects throughout North America and worldwide.

• Mass Concrete Specification Assistance

  Review of mass concrete specifications and development of performance-oriented alternative limits suited to project conditions.

• Thermal Modeling and Thermal Control Plan Development

  2-D and 3-D thermal analysis and written thermal control plans for submittal to the engineer of record.

• Thermal Stress Analysis

  3-D thermal stress modeling to predict and mitigate cracking risk in mass concrete placements.

• Crack Mitigation
• Cooling Pipe System Design

  Design of cooling pipe systems including pump and chiller sizing for temperature management in large concrete placements.

• Hot Weather Concrete Plans
• Cold Weather Concrete Plans
• Tremie Concrete Plans

Evaluation of cementitious and other building materials through optical microscopy, covering concrete distress diagnosis, stucco and floor system failures, aggregate evaluation, and air-void system analysis.

• Petrography
• Materials Evaluation
• Historic Structures Materials Evaluation

  Examination of mortar and concrete from historic structures, including coordination of laboratory testing programs for large-scale projects.

Prebid planning, placement condition preplanning, peer review, and troubleshooting support for new concrete construction.

• Prebid Thermal Control Planning

  Free cost estimates of thermal control plan scope and prebid guidance on mass concrete risks and pitfalls before bid submission.

• Preplanning for Concrete Placement Conditions

  Written hot weather, cold weather, and tremie concrete plans tailored to the specific job and suitable for submittal to the engineer of record.

• Construction Troubleshooting

  Field response for low strength, variable air, consolidation problems, cold joints, and other in-progress concrete issues.

• Peer Review of Concrete Drawings and Specifications

  Review of concrete drawings and specifications to identify common constructability pitfalls, informed by experience from forensic investigations.

Forensic concrete investigations, condition assessment, materials failure analysis, and expert support for construction disputes.

• Site Evaluation and Condition Assessment

  Immediate on-site response for construction disputes or failures.

• Construction Observation and Forensic Mapping

  Professional on-site presence to document and help resolve construction problems and disputes.

• Materials Defect Troubleshooting

  Material failure investigations through careful sampling, testing, and analysis.

• Modeling of Materials Behavior

  Computational modeling of material failures caused by thermal stresses, corrosion, alkali-silica reactivity, creep, and shrinkage.

• Concrete Durability Assessment

  Assessment of long-term structural performance, comparing design service life with actual in-service behavior.

• Failure Investigation

  Determination of how and why a failure occurred, with expert witness and litigation support services.