PREMIX AND TYPES OF PREMIX - Premix usually refers to a substance or object which is mixed in an early stage in the manufacturing and distribution process. This term is used usually for concrete in civil engineering. Sheet Asphalt - a premix of bitumen and sand (with or without filler) and containing coarse aggregate that exceeding 30%, laid in thickness varying from ¾" to ½" (dense carpet, stone metal is discarded and chipping limited to 30%, the rest being sand). Asphaltic concrete - a premix of bitumen and sand (with or without filler) and not less than 30% by weight of mineral aggregate of size larger than sand, mixed and laid at high temperature around 35 degrees Fahrenheit and required heavy binder generally are 50-60, 60-70, 70-80, 85-100. Prime Coat - the initial application of binder to an absorbent highway surface prior to the construction of a wearing coat. Tack Coat - the initial application of binder to and existing given surface, to ensure thorough bond b/w the new construction and existing surface. Prime Coat assists in promoting and maintaining adhesion b/w the road base and the bituminous surfacing. By pre-coating the surface of the road base and wearing coat are glued by penetrating the prime coat in the voids near the surface.

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Premix and Types of Premix

What is a Premix and Types of Premix
Premix usually refers to a substance or object which is mixed in an early stage in the manufacturing and distribution process

By: Haseeb Jamal 

Definition:

Something that is mixed or blended from two or more ingredients or elements before being used.

This term is used usually for concrete in civil engineering.

Premix usually refers to a substance or object which is mixed in an early stage in the manufacturing and distribution process.

Types of premix

1.        Sheet Asphalt

2.        Asphalt concrete

3.        Prime-coat

4.        Tack-coat

1. Sheet Asphalt

A premix of bitumen and sand (with or without filler) and containing coarse aggregate that exceeding 30%, laid in thickness varying from ¾" to ½" (dense carpet, stone metal is discarded and chipping limited to 30%, the rest being sand)

2. Asphaltic concrete:

A premix of bitumen and sand (with or without filler) and not less than 30% by weight of mineral aggregate of size larger than sand, mixed and laid at high temperature around 35 degrees Fahrenheit and required heavy binder generally are 50-60, 60-70, 70-80, 85-100.

3. Prime Coat:

The initial application of binder to an absorbent highway surface prior to the construction of a wearing coat.

Purpose of Prime Coat:

·     It assists in promoting and maintaining adhesion b/w the road base and the bituminous surfacing. By pre-coating the surface of the road base and wearing coat are glued by penetrating the prime coat in the voids near the surface.

·     It helps to bind the finer particles of aggregate together in surface of the road base.

·     If the application of the surface is delayed for some reason it provides the road base if the application against the detrimental affect of rainfall and light traffic.

4. Tack Coat:

The initial application of binder to and existing given surface, to ensure thorough bond b/w the new construction and existing surface.

Haseeb Jamal. I am a Civil Engineer, graduated from University of Engineering and Technology, Peshawar, Pakistan in 2010. I also have a PG-Diploma in Disaster Management and MS in Urban Infrastructure Engineering (In Progress). My expertise include civil related softwares like AutoCAD, SAP2000, MS Project, Primavera, MS Office and GIS. My technical skills include project management, monitoring and evaluation, structural assessment, disaster risk management, Quantity survey, land survey, material testing, site management and technical writing. I am trained in writing project progress reports as well as proposals and concept papers. I have also received advanced training on surveying, proposal writing, Monitoring and Evaluation of projects as well as organizations.

I have worked as Project Engineer at National Research and Development Foundation, Peshawar and CENCON Associates. I also worked with Spectra Engineering Solutions as Senior Civil Engineer in monitoring of World Bank and UNDP funded projects all over Khyber Pakhtunkhwa and FATA. Currently, I am working as Deputy Manager Development at NayaTel, Peshawar.

https://www.aboutcivil.org/premix-types-uses-purposes.html