Lime Mixer Machine Operator

General Summary

Operator will perform a pre trip inspection prior to commencing work, and needs ot be capable of mixing lime at at various depths with consistency in accordance with TXDOT Quality Control specifications.

Essential Job Accountabilities

• Machine Setup & Operation: sets up, controls, and maintains the industrial machinery used to blend raw lime (calcium oxide or hydrated lime) with water, sand, or other chemical aggregates. Because of the highly caustic nature of lime, this role requires strict adherence to safety protocol alongside careful mechanical management. Calibrate, load, and run heavy mixing machine
• Batch Consistency & Measurements: Weigh, measure, and load raw chemical ingredients according to precise formula specifications. For construction and masonry mortars, operators manage specific water-to-lime proportions and monitor exact mix durations (typically around 10 minutes) to ensure proper chemical blending without losing light materials to the wind
• Quality Assurance: Inspect the "slump" or thickness of the output and pull regular physical samples to verify chemical ratios conform to rigorous quality standards.
• Preventative Maintenance: Clean machinery components, troubleshoot blockages with hand tools, and clear bulk sediment between formulation changes to keep equipment operating efficiently.
• Safety & PPE Compliance: Due to hazardous dust and chemical burn risks from quicklime, operators must wear specialized Personal Protective Equipment (PPE) including respirators, goggles, and caustic-resistant gloves.

Education

• High School Diploma, GED or equivalent years of experience

Work Experience

• Appropriate training and experience required

Knowledge, Skills and Abilities

Workers should be able to:

• Operator Mixer Machine
• Practice good safety habits
• Work in dusty or dirty surroundings
• Follow instructions and meet set standards
• Make decisions based on verifiable standards.

Physically, workers must be able to:

• Stoop, bend, and crouch
• Use hands, arms, and legs fully
• See well (either naturally or with correction)
• Lift up to 50 pounds, with frequent lifting and carrying of objects weighing up to 25 pounds.