Laboratory Chemist - Construction Chemicals & Cement Grinding Aid

Workplace Type

Full-time

Job ID: IJOB202668867

Department: QC / Laboratory / R&D

Reports To: QA/QC Manager / Technical Manager

Raw Material Testing

• Inspect and test incoming raw materials according to approved specifications.
• Check physical and chemical properties of raw materials used for admixture and grinding-aid production.
• Approve or reject raw materials based on test results and company specifications.
• Maintain complete records of raw-material testing.
• Evaluate new raw materials and alternative suppliers.
• Report any abnormal or out-of-specification raw material to the QA/QC Manager.

Construction Admixture Quality Control

• Test finished admixture products according to approved specifications and SOPs.
• Perform tests such as appearance, density/specific gravity, pH, solids content, viscosity, and other applicable parameters.
• Conduct concrete/mortar performance tests where required.
• Check admixture dosage and its effect on concrete performance.
• Evaluate workability/slump, slump retention, setting time, water reduction, and compressive strength as applicable to each product.
• Check batch-to-batch consistency.
• Release finished products only after required QC tests are completed and approved.

Cement Grinding Aid Testing

• Conduct laboratory evaluation of cement grinding-aid products.
• Test different grinding-aid formulations and dosages.
• Evaluate the effect of grinding aid on cement grinding performance.
• Monitor cement properties such as fineness, setting time, strength development, and other applicable parameters.
• Conduct comparative trials against existing products or competitor/reference products when required.
• Maintain records of grinding-aid trials and test results.
• Assist the technical team in optimizing grinding-aid dosage and formulation.

Product Development & R&D

• Assist in development of new construction admixture and cement grinding-aid formulations.
• Conduct laboratory-scale formulation trials.
• Optimize formulations for performance, stability, and cost.
• Evaluate new chemicals and raw materials for potential use.
• Maintain formulation and trial records.
• Conduct stability and compatibility studies where required.
• Support scale-up from laboratory trial to production batch.
• Keep formulation information confidential.