مصنع تعباه اسمنت cement plants

اسمنتcement

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Power Plus Cement - Portland Cement (I 42*5N )
Ex- Mombasa Plant - For construction of high-rise projects* bridges* slip forming works* fast track projects and marine construction. For special applications* it may be utilized efficiently on large construction projects to optimize performance. These applications require good technical ability* quality control and experience to design mixes.



Nguvu Cement II/B-P 32*5R - Portland Pozzolana Cement
Ex-Nairobi Grinding Plant – wide application from domestic concrete to large building projects. It’s good strength performance makes it suitable for both
general purposes and structural concrete applications. General construction i.e. beams* suspended slabs* columns* water retaining structures* mass concrete* high rise projects
etc.




Nguvu Cement II/B-L 32*5R - Portland Limestone Cement
Ex-Mombasa Plant - wide application from domestic concrete to large building
projects. It’s good strength performance makes it suitable for both general
purposes and structural concrete applications .General construction i.e. beams* suspended slabs* columns water retaining structures* mass concrete* high rise projects etc.

Storage and usage information

STORAGE
Store bagged cement on a raised floor in a damp-proof shed. If this is not possible* then store the cement on a raised platform and cover with waterproof sheeting. Use the cement in the order you receive it. i.e. first in first out.



WATER
In general* the more water used for a given quantity of cement* the weaker the concrete or mortar will be. It is therefore important to use the minimum amount of water required to make the mix workable.



MIXING
Accurately measure all materials with a suitable container (wheelbarrow or bucket). Mix thoroughly until a uniform colour is obtained. Add water whilst mixing to avoid adding too much water.



CURING
Concrete or plaster should be kept moist for at least 7 days to prevent cracking and to ensure that it's strength increases. Spray gently with water and protect it with plastic sheets (or wet Hessian) to prevent it from drying out.

Other information:

Transport in vehicles with adequate protection from weather
Arrange cement bags on timber pallets/platform at least 15cm above the floor. Place stacks away from external walls and they should not exceed 10 bags.
The cement should not be lumpy
Cement should be from bags that are not torn or interfered with.

Health and Safety Warning:

When Working with cement wear safety glasses and gloves
Wash you hands after working with wet cement
In the event of cement contact with your eyes* rinse thoroughly with water and get medical attention if necessary
Keep Cement out of reach of children

A few tips on building:

Use clean aggregates without dust* clay or other impurities.

Store aggregates and sand on a clean hard surface to avoid mud/dirt

Water fit for drinking is adequate for mixing. Surfaces of formwork/ shuttering that will be in contact with concrete should be well oiled prior to placing.

Testing of concrete constituents and reinforcement should be done before delivery. Trial mixes should also be done and approved.

Proper and controlled batching is important to avoid segregation during transfer.

Concrete should not be dropped from over 1m height to prevent segregation of the mix and bubbles formation.

Concrete should be well compacted to remove air bubbles and cavities.

Concrete should be cured i.e. kept in a continuously moist condition for several days.

Concrete or plaster should be well-cured (kept wet) 3-4 times a day for at least 7 days to prevent cracking. Spray gently or protect with plastic sheets (or wet sacks) to prevent rapid drying.

Correct curing increases impermeability* durability and decreases shrinkage
Reinforcement

Should be stacked off the ground to avoid dirt/mud

Should be kept free from mud* oil* paint and loose rust

During fixing they should be fixed in position with soft wire.

Ends to be cut off or bent inwards to prevent staining. Provide adequate cover

Blinding layer - Thin layer of concrete normally put on the ground in preparation for foundation building.

CEM I 42.5 N and CEM I 42.5 R - Technical notation for Portland cement. Letter N and R refers to the early day strengths of cement. N refers to cement with normal early day strengths while R refers to rapid hardening cements i.e. cements with high early day strengths. Notation is as per the new Kenyan Standard adopted from the EN Standards.

Cement Standards - Documents that guide the manufacture of cement* testing as well as determine the properties and constituents of the product

Class - Refers to the strength of concrete after 28 days e.g. class 40 describes concrete with strength of 40 Kn/mm2 (Kilonewtons per square meter) at 28 days.

Clinker - Compound produced after cooling raw meal previously burnt to partial melting point at 14500C

EN Standards (European Norm - Standards that originated from the European Countries

KS - Kenya standards

KS 02- 1262: 1993 - Previous Kenyan standard for manufacture of Ordinary Portland Cement before adoption of EN standards

KS 02-1263: 1993 - Previous Kenyan standard for manufacture of Portland Pozzolana Cement before adoption of EN standards

KS 1725 Part 1: 2001 CEM II/B-L 32.5R - Technical notation for Portland Limestone cement. L refers to the Limestone additive in cement. Notation is as per the new Kenyan Standard adopted from the EN Standards.

KS 1725 Part 1: CEM II/B-P 32.5 - Technical notation for Portland Pozzolana cement. P refers to the pozzolana additive in cement. Notation is as per the new Kenyan Standard adopted from the EN Standards.

Portland Cement - Name originated from the resemblance of the color and quality of the hardened cement to Portland stone* limestone quarried in Dorset (In England). The term is now a generic name for cement worldwide and describes cement made from mixing calcareous or argillaceous* or other materials with silica* alumina* and iron oxide* burning them at a melting temperature of 14500C to produce clinker

Pozzolana and Limestone - Additives used in the making of cement

Raw meal - is a finely ground mixture of coral stone* bauxite* iron ore and shale before burning to make clinker

EASY APPLICATION INSTRUCTIONS

IMPORTANT! DO FOR ALL PRODUCTS:

* Make certain all surfaces to be repaired are clean - free from grease* dirt* oil film* release agents and marine growth. Clean* chip or wire brush all surfaces down to fresh concrete. Remove all loose material.
* Add water to mix only. Do not add mix to water.
* Just before application* be certain all surfaces to be repaired are wet. (except Jet Set Smooth)
* After final set* (about 10 minutes) use curing agent* or keep repair wet* especially in hot or dry weather.
* Clean mixing equipment after each batch. It can re-temper the next batch* or harden on.

IMPORTANT! DON’T:

* Do Not apply to dry surfaces. (except Jet Set Smooth)
* Do Not apply to dirty* slimy or oily surfaces.
* Do Not overwork repairs.
* Do Not Re-mix. Do not brush with water until after final set (about 10 minutes).
* Do Not add mix to water. (except Jet Pour)
* Do Not use bonding agents. (except Jet Set Leveler)

JET SET Complete Repair:

Mix to a no slump consistency. Do not add too much water. Mix should mound up with no slump.
Thoroughly wet the surface that is to be repaired* then place mix firmly to existing concrete* wood or steel. May be applied underwater (allow mixture to begin firming before underwater application).
Mix the material for no more than 1 or 2 minutes before application.
Mix only enough material so that it can be used in 4 or 5 minutes. Allow repair to become firm to the touch - 6 to 10 minutes - then shave to grade with trowel edge. Finish repair in usual way. Do not overwork. Do not brush with water until final set (about 10+ minutes).

JET PLUG :

Mix to a no-slump consistency. Add only enough water to gain a consistency of heavy glazing putty.
Do not mix the material for more than 1 minute after adding water. It is very fast setting.
Mix only enough material so that it can be used in 1 or 2 minutes.
Seal adjacent areas* chip a V-shaped void in pressure seepage areas* or chip and clean the hole or opening to be plugged. Wet the surface. Form a plug slightly larger than crack* hole or opening* hold in hand until firming starts* 1 minute or so* then force plug into void solidly and hold until firm* 1 or 2 minutes.
After plug becomes firm* shave to grade with trowel edge.
For normal sealing* Jet Plug can be troweled into place. Do not overwork.
For patching* follow the same mixing directions. Apply like Jet Set Complete Repair* but shave and finish after about 2-3 minutes.

JET POUR:

Mix clean water with dry material to attain a consistency of heavy syrup.
When mixing to place vertically* add less water for a putty like consistency. After attaining proper consistency* mix for 1 or 2 minutes.
If JET POUR mixture becomes too watery* additional powder may be added in the first few minutes.
Mix only enough material so that it can be used in 8 or 10 minutes.
Remove puddled or excess water from hole or void.
Pour to proper level. Don’t touch for several minutes until repair begins to harden. Shave and finish.

JET SET SUPER-X:

Mix to a no slump consistency. Do not add too much water. Mix should mound up with no slump.
Thoroughly wet the surface that is to be repaired* then place mix firmly to existing concrete* wood or steel. May be applied underwater (allow mixture to begin firming before underwater application).
Mix the material for no more than 1 or 2 minutes before application.
Mix only enough material so that it can be used in 4 or 5 minutes. Allow repair to become firm to the touch - 6 to 10 minutes - then shave to grade with trowel edge. Finish repair in usual way. Do not overwork. Do not brush with water until final set (about 10+ minutes).

Curing procedures must be used.

JET SET CONCRETE RESTORE:

SURFACE PREPARATION
The concrete must be clean and sound* free of all foreign substances including particles* dust* dirt* grease* marine growth* or anything that might inhibit bonding. Scrabble if necessary. Fill major breaks and voids with Jet Set Complete Repair prior to application of Jet Set Concrete Restore. Priming is not necessary. Wetting of the substrate is not necessary.

MIXING
Mixing by mechanical means is preferred. Use a heavy-duty drill with efficient paddles. Use approximately 9 pints of water per 40 lb. bag of Jet Set Concrete Restore. Mix for approximately 1 minute* or until a smooth consistency has been obtained. Varying the amount of water slightly to attain the desired consistency will have little effect on performance.

APPLICATION
Apply Jet Set Concrete Restore immediately after mixing. Pump or pour onto the application area* then spread with a trowel* float or rake. Restore may be applied to any thickness* but if application is deeper than one inch* addition of pea gravel or coarse aggregate may be used to reduce cost. It can be troweled to a featheredge* but do not overwork. Forms may be used. Priming is not necessary. Wetting of the substrate is not necessary. A broom finish may be applied in approximately 15-40 minutes* depending on temperature.

CURING
In-service time is approximately 1-2 hours for foot traffic* and 4-6 hours for rubber tire traffic. Cure time is affected by temerature.

WORKING TIME
Jet Set Concrete Restore has a working time* or pot life of approximately 30 minutes.

TEMPERATURE
Temperature affects open time and cure time. Minimum application temperature is 40 degrees and maximum is 90 degrees. All Jet Set testing is conducted at 70 degrees. Adjust working time and cure time to compensate for temperature variations.

YIELD
One 40 lb. bag of Jet Set Concrete Restore wil hield approximately 0.42 ft3 and will cover approximately 20 ft2 at a thickness of 1/4 inch.

It is imerative to conduct your own testing to determine suitability for your particular applications.



For Patching*

Mix with water to a thick puttylike consistency. Mix should mound up with no slump. Use clean water.
Mix the material for no more than 1 or 2 minutes before application.
Mix only enough material so that it can be used in 4 or 5 minutes.
Thoroughly wet the surface to be repaired.
Firmly apply mix to existing concrete* or medium to be repaired. May be applied underwater (allow mixture to begin firming before underwater application).
Allow repair to become firm to the touch - 6 to 10 minutes - then shave to grade with trowel edge. Finish repair in usual way. Do not overwork.

For Slurry Coating*

Mix to desired consistency for ease of application. Mix as thickly as possible* yet still comfortable for application.
Wet the area to be coated.
With gloved hand* firmly apply and smooth over desired area.

JET SET SMOOTH :

Make sure surface is clean and contaminant free. Power wash if necessary.
Add enough clean water to mix to attain a soft putty consistency – comfortable for troweling.
Mix enough material in a batch so that it can be used in approximately 15 minutes.
Trowel the material onto wall. Work it firmly into fissures* holes and cracks. Be sure it completely fills these voids.
Trowel to desired thickness. It can be feathered to micro-thin.
No grinding is necessary* as the edge will be virtually undetectable.
Allow at least 24 hours before painting. Jet Set Smooth is very low alkalinity* so accepts paint well.
Bonding agents can be used if desired.

JET SET – WILSON LATEX:

Make certain that the surface to be repaired is free from grease* dirt* oil film* curing compounds* marine growth* dust* and loose particles.
Mix cool clean water with dry material to attain a heavy putty consistency.
Mix only enough material so that it can be used in 8 or 10 minutes.
Allow at least 12 hours (preferably 24 hours) prior to installation of floor covering.
For patching* firmly place patch* allow it to take initial set* then shave to grade and finish.
For coating* mix to slurry consistency and trowel into place* any thickness to feather edge.

JET SET LEVELER

SURFACE PREPARATION
The concrete surface must be clean and sound. All dirt* grease* marine growth* dust* or any foreign substances that might inhibit bonding must be removed. Fill breaks and voids with Jet Set Complete Repair prior to application of Jet Set Leveler.

PRIMING
A high quality primer is recommended to obtain optimum leveling characteristics. However* Jet Set Leveler may be applied directly to the substrate. 2 applications of priming agent will provide optimal results* one for sealing and one for priming. Allow primer to become tacky before applying Jet Set Leveler. Do not wait more than 24 hours between application of primer and pouring Jet Set Leveler.

MIXING
Mix by mechanical means. Use a heavy-duty drill with efficient paddles. Use 9 1/2 pints of clean water per 40 lb. bag of Jet Set Leveler. Up to 3/4 pint additional water may be used if desired* but do not over-water. Mix until a smooth consistency has been obtained. Pea gravel or larger aggregate may be added for thick applications* but use less water. This will produce a non self-leveling mix. A second application of Jet Set Leveler without the aggregate is required to obtain the desired self-leveling properties.

APPLICATION
After the primer is tacky or dry* apply Jet Set Leveler immediately after mixing. Pump or pour onto the application area* then spread with a rake* trowel or perferred tool. It can be troweled to a featheredge* but do not overwork. Jet Set Leveler may be applied to any thickness. For applications thicker than one inch* a base layer with pea gravel may be applied to reduce cost. Use less water* which will reduce workability and produce a rough surface* which will then need a second application of pure Jet Set Leveler to attain the desired self-leveling properties.

CURING
The in-service time for Jet Set Leveler under normal conditions is 4 hours for foot traffic. Heavy wheel vehicles and machinery are not recommended. During hot and/or dry weather* cure by applying a fine water mist. Temeratures below 50 degrees slow the curing time. Allow 24 hours for curing before installing over-layment. Installer must determine after 24 hours if moisture readings comply with standard industry limits before applying coverings.

YIELD
one 40 lb. bag of Jet Set Leveler will yield aproximately 0.42 ft3 and will cover approximately 24 ft2 at a thickness of 1/4 inch.

STORAGE
Store above 45 degrees. Avoid high temperature and humidity. Shelf life is 1 year in original container.

WORKING TIME
Jet Set Leveler has a working time of 15-30 minutes at 70 degrees.