SpECbuild SG15

High-strength, polymer-modified repair compound for structural use.

Name: SpECbuild SG15
Brand: SpEC
Availability: InStock

SpECbuild SG15 is a high-strength, one-part polymer modified repair compound designed for structural applications. This pre-bagged, cementitious repair mortar provides exceptional abrasion resistance and low permeability, ensuring durability in various environments.

The product is suitable for repairs of concrete elements and surfaces subjected to heavy traffic, offering reliable performance in critical conditions.

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Technical Details

SpECbuild SG15 is designed for a variety of structural repair applications, providing reliable solutions in demanding conditions:

Repairs to structural concrete elements, e.g. reinforced beams and columns
Highly trafficked surfaces, particularly transition strips adjacent to mechanical bridge joints
Repairs in marine environments or other situations where concrete is in contact with chloride or sulphate solutions

SpECbuild SG15 offers a range of advantages that make it an ideal choice for structural repair applications, ensuring long-lasting performance and reliability:

High bond strength to concrete substances.
Good abrasion resistance.
High compressive strength.
Coefficient of thermal expansion similar to host concrete.
Compensated for plastic and long-term shrinkage.
Low permeability providing protection against the ingress of chlorides and carbon dioxide.

The following table outlines the technical specifications of SpECbuild SG15 to ensure informed usage and application:

Property	Value	Test Method
Compressive strength @ 28 Days	55±5 MPa	ASTM C109
Flexural strength @ 28 Days	8±2 N/mm²	ASTM C348
Fresh wet density	2200 kg/m³	–
Coefficient of thermal expansion	11.2 x 10⁻⁶ /°C	ASTM C531
Water absorption (ISAT) @ 10 minutes	0.01 ml/m²/sec	ASTM C1585
Water absorption (ISAT) @ 30 minutes	nil	ASTM C1585
Linear Shrinkage @ 7 days	0.063%	ASTM C531-00

The following section outlines the application process for SpECbuild SG15, providing essential steps for ensuring optimal performance:

Preparation:

It is essential that adequate preparation is carried out prior to the application of SpECbuild SG15. This preparation should ensure the removal of all grease, oil, and loose material. The area to be reinstated using SpECbuild SG15 should be cut back to a depth of at least 10mm to avoid “feather edging”. It is advisable to neatly delineate the repair boundary by saw cutting to a depth of 10mm.

Substrate Priming:

For most situations, the substrate should be primed with SpECbuild Primer S1. Initially, the surface should be thoroughly saturated without standing water prior to the primer being applied by brush, ensuring intimate contact with the substrate. This is best achieved by using a circular scrubbing action. SpECbuild SG15 can be applied as soon as the primer becomes tacky.

Mixing:

For mixing a single bag, place 2.25 to 2.75 litres of clean water in the mixing vessel and slowly add the contents of the bag with the mixer running. The product should be mixed for a minimum of 5 minutes. This product cannot be mixed by hand.

Application:

SpECbuild SG15 can be applied by a gloved hand to ensure thorough compaction around the reinforcement and against the edges of the reinstatement area. The repair is then trowel finished. The product can be applied up to 15mm in thickness in vertical, unsupported situations.

Curing:

SpECbuild SG15 should be cured using SpECcure WE. In extreme drying conditions, a second coat should be applied immediately after the first coat has dried.

SpECbuild SG15 is available in convenient packaging to ensure easy handling and application:

Product Packaging: 25kg bags

Coverage: 1.1m² @ 10mm thick

For information regarding product warranty and assurance details for SpECbuild SG15, please contact our team at SMCC using any of the contact methods available on this page.

Product FAQ

What surfaces can SpECbuild SG15 be applied on?

SpECbuild SG15 can be applied on structural concrete elements, reinforced beams, columns, and highly trafficked surfaces including transition strips adjacent to mechanical bridge joints. It is also suitable for repairs in marine environments or areas exposed to chloride and sulphate solutions.

What is the maximum thickness for application?

The maximum thickness for application is 15mm.

What is the curing method for SpECbuild SG15?

SpECbuild SG15 should be cured using SpECcure WE. In extreme drying conditions, a second coat should be applied immediately after the first coat has dried.

How do I prepare the surface for application?

To prepare the surface for application, remove all grease, oil, and loose material. Cut back the area to be reinstated to a depth of at least 10mm, ensuring clean edges. For best results, saw cut the repair boundary to prevent feather edging.

What are the key benefits of SpECbuild SG15?

SpECbuild SG15 offers high bond strength, excellent abrasion resistance, and high compressive strength. Its low permeability protects against chlorides and carbon dioxide ingress, while its coefficient of thermal expansion is similar to that of host concrete. The product compensates for both plastic and long-term shrinkage, making it highly durable for structural repairs.

How do I mix SpECbuild SG15 properly?

To mix SpECbuild SG15 properly, place 2.25 to 2.75 litres of clean water in a mixing vessel. Gradually add the contents of the 25kg bag while the mixer is running. Mix for a minimum of 5 minutes with a slow speed electric drill fitted with a mixing paddle. Ensure thorough mixing for optimal performance, as hand mixing is not suitable.