Use of High-Early Strength Concrete in the Construction of National Roads and Major Interchanges. Category: Department OrderSub Category: construction-materialsSeries: 1995No: 155File: DO_155_S1995.pdfDate: Monday, September 4, 1995Tags: Use High-Early Strength Concrete Construction National Roads materials 155 Read more about Use of High-Early Strength Concrete in the Construction of National Roads and Major Interchanges.