Sika MonoTop®-436 N is a 1-component pre-bagged, pourable, self-compacting repair mortar meeting the requirements of class R4 of EN 1504-3.
Uses & Advantages
Suitable for restoration work by recasting (Principle 3, method 3.2 of EN 1504-9).Repair of spalling and damaged concrete in buildings, bridges, infrastructure and superstructure works.
Suitable for structural strengthening (principle 4, method 4.4 of EN 1504-9). Increasing the bearing capacity of the concrete structure by adding mortar.
Suitable for preserving or restoring passivity (principle 7, method 7.1 and 7.2 of EN 1504-9). Increasing cover with additional mortar and replacing contaminated or carbonated concrete.
Repair of concrete on buildings and civil engineering structures for areas including:
CHARACTERISTICS AND ADVANTAGES
Class R4 of EN 1504-3
Very good flow properties
Self compacting micro-concrete
Placed from 20mm to 300mm in one pour
Excellent adhesion to host Concrete
Low water and chloride permeability
Finished surface can be painted after formwork is removed
Compatible with Sika® FerroGard® Sacrificial Anode System
20 kg bags
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.
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.
Colour accuracy disclaimer: We have taken care to display the most accurate visuals of our products. However, we are not responsible for the colour accuracy of the device you are viewing our swatches on. These variations arise due to different computer monitors and devices (make, model and technology, as well as resolution, contrast and brightness control settings) in much the same way a scan will differ from an original image and a colour photocopy. Furthermore, coatings can exhibit variation in perceived colour depending on gloss level and application method. If you require a very specific colour match, please make your selection via actual swatches and colour boards available at our showroom.
Product Disclaimer: Ensure you read all product, technical and safety data sheets prior to application as liability falls on the applicator. All products must be applied in accordance with manufacturer’s recommended method.