Mortar has played a major role in construction since ancient times, with the oldest example found in Israel and thought to date back 10,000 years. Much of the ancient mortar still in existence remains durable today, a testament to the long-lasting nature of the material.
In practice, a mortar joint acts as a sealant, a bearing pad, the glue that sticks the units together yet keeps them apart. In this sense, it performs as a gap-ﬁlling adhesive.
Today, mortar in the UK is produced to the speciﬁcation BS EN 998-2: Speciﬁcation for mortar for masonry – Part 2: Masonry mortar.
BS EN 13318 defines a screed as: A layer or layers of screed material laid in situ, directly onto a base, bonded or unbonded, or onto an intermediate layer or insulating layer, to obtain one or more of the following purposes:
- To obtain a defined level
- To carry the final flooring
- To provide a wearing surface
Mortar and Screed Testing
ACS Testing carry out a wide range of mortar and screed in-situ testing in hospitals, schools, shops, and warehouses. In addition, we take fresh samples for laboratory analysis.
We also carry out in-situ crushing resistance (ISCR) testing on screeds laid in the above-mentioned buildings. The screed is subjected to repeat impact blows. A weight is dropped vertically down a guide onto a hardened steel anvil in contact with the screed surface. This test determines the resistance of levelling screeds to the crushing effect of imposed loads and traffic in service.
Our Hygrometer survey of screed is to determine the humidity of the screeds. This is required before flooring products are laid and bonded to the screed surface.
Our In-Situ and Laboratory testing includes:
|Test||Method||What is shows|
|In-Situ Crushing Resistance of Screeds||BS 8204-1||Resistance to the crushing effect of imposed loads and traffic|
|Hygrometer Survey||BS 5325||Measurement of relative humidity values above porous surfaces such as screeds and concretes|
|Flexural and Compressive Strength of Screed||BS EN 13892-2||Determines the flexural and compressive strength of prisms|
|Mix Proportions of Screed||BS 4551||Determines traditional volume proportions and screed designation|
|Adhesive strength of hardened rendering and plastering mortar||BS EN 1015-12||Determines the maximum tensile stress applied by a direct load at right angles to the surface of the rendering|
|Flexural and Compressive Strength of Mortar||BS EN 1015-11||Determines the flexural and compressive strength of prisms|
|Mix Proportions of
|BS 4551||Determines traditional volume proportions and mortar designation|
Please see below for a list of the services provided by ACS:
The ACS Geo-Environmental Consultancy Department has been operating as part of ACS for over 10 years.
ACS offers a comprehensive range of professional on-site testing, all carried out by our fully trained site technicians.
From our main laboratory in Poole, Dorset, ACS provide quality testing and material consultancy for the construction and civil engineering industry.
ACS carries out testing on new bituminous binder material and testing on hardened material for physical and chemical properties. Circa pre 1980’s Tar (Carcinogenic effects) was also used as a binder, ACS staff can sample and test materials to assess if Tar was used.
Concrete was the first service to be offered by ACS back in 1987. Since then, we have increased our scope to cover a wide range of UKAS Accredited testing methods on fresh and hardened concrete.
ACS can sample and test new and hardened mortar. Hardened mortar for mix proportions and constituents, new mortar for compressive and flexural strength.
At ACS we offer an efficient and reliable chemical analysis service for waste soils and construction materials using various test solids and leaching procedures specified by the Environment Agency.
The ACS chemical laboratory was established in 2007. It complements the physical materials testing service provided by ACS by offering a range of chemical analytical services.
Our purpose-built analytical laboratory enables ACS to provide a comprehensive sampling, monitoring and analysis service on a wide range of leachate and water samples.
Our newly refurbished stone testing laboratory has given us the opportunity to expand our testing scope. In addition, we have increased production and improved on our turnaround of samples.
CONTACT ONE OF THE TEAM
If you require a collection that is outside of our usual range, please feel free to call us on 01202 622858.
Or contact us and we will do our best to accommodate your requirements.