Home Products & Solutions Technical & Testing Technical & Testing Through Holcim’s laboratories that are accredited with the International Accreditation New Zealand (IANZ), we are able to provide a range of cement, concrete and aggregate testing for customers. Call us - 0800 HOLCIM Contact a sales rep Find a location Our Scope The accreditations of our labs are listed on the International Accreditation New Zealand (IANZ) website: IANZ Scope of Accreditation: Hastings IANZ Scope of Accreditation: Auckland