Sika MonoTop®-436 N

• Qld Roads (TMR) Section 5. Registered and Conforming Products. Part 5.34 Repair Mortars
• Potable Water approved to AS4020:2018 - Testing of products for use in contact with drinking water
• RTA Rapid Mortar Bar Test RTA T363 - Alkali Reactive Particles <0.1% (Non-Reactive).

Portland cement, selected aggregates and special additives

9 months

Store properly in undamaged original sealed packaging, in dry cool conditions.

D_max: 4.0 mm

Fresh mortar density: ~ 2.3 kg/l

Sika MonoTop®-436 N is a part of system for concrete repair:

Material and curing conditions at 23°C / 50% r.h.

Above results based on 50mm x 50mm cubes @ 2.5 litres water per 20kg bag

2.5 to 2.7 litres of water for 20 kg powder

20mm min. / 300 mm max.

+5 °C minimum; +30 °C maximum

+5 °C minimum; +30 °C maximum

~ 40 minutes at +20°C

~ 4.5 hours

~ 7.5 hours

20 kg of powder yields approximately 9.8  litres of mortar

Sika MonoTop®-436 N can be mixed with a low speed (~500 r.p.m.) electrical hand drill mixer with vertical axis for 1 to 2 bags taking care not to entrap air in the mix, or using a force action pan mixer for 2 to 3 bags - or more - at once, depending on the type and size of mixer. Pour the water in the correct desired proportion into a suitable mixing container. While stirring slowly, add the powder gradually in the water and mix thoroughly at least for 3 minutes, adding additional water during the mixing time if necessary up to the maximum specified amount, until the required homogeneous and lump-free consistency is achieved. For larger mixes the mixing time could be extended (up to 5 minutes or as necessary) until the mortar is homogenously mixed with no lumps and no remaining dry powder. Mix full bags for best results. 20 kg of Sika MonoTop®-436 N powder is mixed with 2.5 - 2.7 L of water depending on the required consistency.

Bonding Primer:
On a well prepared and roughened substrate a bonding primer is generally not required. When a bonding primer is not required pre-wet the surface continuously for 2 - 6 hours with clean water. Immediately before casting remove all water from formwork. The surface shall not be allowed to totally dry before application of the concrete repair mortar. The surface shall achieve a dark matt appearance without glistening and surface pores and pits shall not contain water (saturated surface dry-SSD) condition.

Reinforcement Corrosion Protection:

Where a reinforcement coating is required as a barrier (e.g. in case of insufficient concrete cover), apply to the whole exposed circumference two coats of Sika MonoTop®-910 N or SikaTop® 110 EpoCem® (Refer to the relevant Product Data Sheet).

Pouring / Filling:

The product should be poured directly on the wet mat substrate or inside the formwork prepared for the casting. By using more than one mixer and with the proper organization, you can pour the fresh material reducing construction joints. After mixing Sika MonoTop®-436 N, leave the mortar to stand for ~1-2 minutes; stir again with a trowel and then pour immediately into sealed, rigid - stable prepared formworks. To make optimum use of the product's expansion properties apply the mortar as quickly as possible (within max. 15 minutes). Pot life shall also be taken into consideration, adjusting for weather conditions, when planning the work duration.
 

Protect the fresh mortar from early dehydration using the relevant curing method.
Cure for a minimum of 7 days to minimise cracking. Use a 90% efficient curing membrane or polythene sheeting taped down at the edges.

Clean all tools and application equipment with water immediately after use. Hardened / cured material can only be removed mechanically.