Bearing Grout

Special Purpose Shrinkage Compensated Cementitious Grout Abbot Bearing Grout is Manufactured by SBD Limited Fully compliant with the Highway Works Specification Clause 2601 this grout is the ideal solution for the under-pinning of safety fencing and similar posts.

Description SBD Bearing Grout is a premixed non-shrink cementitious grout developed for bridge bearing applications where an economical grout with good flow and strength is required. SBD Bearing Grout is designed primarily as a pourable grout but can also be used at a pumpable consistency. SBD Bearing Grout complies fully with the requirements of Dept. of Transport Clause 2601 (Aug 1993) for Bedding Mortar. Uses; · Providing a stable base under bridge  bearings · Fixing bridge ballustrades, starter bars, barriers · Grouting under barrier and similar post plates Note: SBD Bearing Grout should always be used where it is confined, i.e. where its expansion can be restrained. Packaging SBD Bearing Grout is supplied in 25 kg polythene lined bags.

Benefits 1) Economical 2) Special purpose grout suitable for use over a temperature range of between 5 deg C and 25 deg C 3) Can be poured or pumped into place 4) Where needed, can be trowelled or 'dry-packed' 5) Excellent flow properties 6) Can be applied in thicknesses ranging from 10 mm to 30 mm under bridge bearings 7) Factory blended to eliminate on-site errors 8) Conforms to ASTM C827 'Early Volume 9) Change of Cementitious Mixtures' producing a non-shrink grout 10) Does not contain metallic additives such as iron or aluminium. 11) Complies fully with the requirements of DTp Clause 2601 for Bedding Mortar. Shelf Life and Storage Store in a cool dry place. Shelf life in correct storage conditions for sealed bags is approximately 12 months.

Properties of the Grout

		Required by Clause 2601
Maximum aggregate size	Below 2.36mm	Below 2.36mm
Chloride ion content	Less than 0.1% of mass cement	Less than 0.1% of mass cement
Cement type used	Rapid hardening to BS12	Rapid hardening to BS12
Acid-soluble sulphate content	Less than 4% mass of cement	Less than 4% mass of cement
Minimum thickness	10mm	10mm
Maximum thickness	30mm	30mm
Water-cement ratio at 4L per 25kg	Less than 0.4	Less than 0.4

Flow cone (Laboratory Calibration Test)	ASTM C939-87	84 sec @ 5 deg C	66 sec @ 20 deg C
Flow between glass plates	HCD Drawing K2	Homgenous, void free, no segregation, no bleeding, no effervesence. Filled plinth completely
Compressive strength	at 28 days	Ave 75.5 N/mm2 @ 20 deg C	DTp requirement : min. 50 N/mm2
Expansion	ASTM C-827-87	1.97% @ 20 deg C	DTp requirement : < 2.5%
Elastic Stability	DTp 2601	Average strain 0.80%	DTp requirement : <1%

Shrinkage SBD Bearing Grout is shown to be non-shrink by ASTM C827 Early Volume Change of Cementitious Mixtures which, unlike other methods, measures expansion or shrinkage from time of placing. Volume expansion to ASTM C827 when unrestrained is greater than 1.5%. Preparation All surfaces should be clean and sound. Concrete surfaces must be free from any contamination including oil, grease, laitance and dust - and for maximum bond the surface should be roughened and pre-soaked with clean water. Immediately prior to grouting, remove free water including that in bolt holes or recesses. Metal surfaces must be free from rust, scale, oil or grease but removable metal shims should be lightly oiled. Bolt holes must be blown free of dust, water or any loose material. Formwork should be well sealed to prevent leakage.

Mixing Mixing and placement can be carried out between +5øC and +25øC. In service, SBD Bearing Grout will perform similarly to other cementitious mixes based on Portland cement in the temperature range of-20øC to +150øC. SBD Bearing Grout needs only to be mixed with clean, potable water to give the consistency required. Mixing should be carried out in a forced action grout mixer or by slow speed drill (max 450 rpm) with helical mixing paddle attachment. To obtain the required consistency, use a water addition of maximum 4 litres per 25 kg. Do not use more than the maximum stated water addition.

Application When pouring, the area to be grouted should be shuttered and a header box used to maintain a grout head of 150-200 mm during the pour. Machine mixing is recommended to achieve continuous pouring. For large applications SBD Bearing Grout can be placed by pump and it has been formulated to give a 30 minute working time. It does not contain metal particles; wear and tear on equipment is similar to conventional sand/cement mixes. Continuous grout flow is essential and sufficient grout and water should be available to be mixed to ensure there is no discontinuity of the flow. Where the thickness of grout is above the maximum 30mm recommended by Clause 2601, the grout may be bulked out with clean single sized aggregate by mixing in up to 10kg of a 6 mm rounded aggregate per 25 kg bag. However, we have other products, including Five Star Repair Concrete, which may be more suitable. Please contact our Technical Department. The grout around the edges of baseplates must be finished flush with the sides by cutting the grout while still green after stripping formwork. Cracking may result in such areas, where there is no restraint. Avoid leaving unconfined areas of grout proud around bearings etc. Keep out of the reach of children. Quality assurance A policy of strict quality control has always been followed and SBD is a BSI registered firm of assessed capability under ISO 9002 (1994), certificate No. FM 1209. SBD is a member of the British Quality Foundation.

Health and Safety This product contains cement which, when mixed with water is strongly alkaline and may cause skin irritation, dermatitis and burns. Wear suitable protective clothing including gloves and a mask. Work in well ventilated conditions and avoid raising dust. In case of contact with the skin, wash immediately with soap and water. In case of contact with the eyes, rinse thoroughly with plenty of clean water and seek medical advice if irritation persists. COSHH regulations The SBD Safe Handling Guide referred to above provides all necessary information and data on the whole of the SBD range in relation to the COSHH regulations (Control of Substances Hazardous to Health). Advice was obtained from experts including the Health and Safety Executive (HSE) to ensure the SBD Safe Handling Guide contained all necessary information for a contractor to carry out a responsible COSHH assessment. Qualified persons e.g. doctors. toxicologists etc. can obtain more detailed information on individual products by writing to our Technical Department. Important Note To the best of our knowledge and belief, the information contained in this leaflet is true and accurate, but as conditions of use and any labour involved are beyond our control, it is the responsibility of the customer to satisfy himself that this product is fit for the purpose for which he intends to use it, and no responsibility can be accepted, or warranty given by our company.

For further information telephone on 01908 511730