Quickly supply alternative strategic theme areas vis-a-vis B2C mindshare. Objectively repurpose stand-alone synergy via user-centric architectures.
Cement is a hygroscopic material meaning that it absorbs moisture. In presence of moisture it
undergoes chemical reaction termed as hydration. Therefore cement remains in good condition as long
as it does not come in contact with moisture. If cement is more than three months old then it should
be tested for its strength before being taken into use.
Whenever you are buying cement, make sure you check the quality, and not just the cement
price.Contact your nearest ACC Dealerto understand the importance of quality.
Portland cement is composed of calcium silicates and aluminate and aluminoferrite It is obtained by
blending predetermined proportions limestone clay and other minerals in small quantities which is
pulverized and heated at high temperature - around 1500 deg centigrade to produce 'clinker'. The
clinker is then ground with small quantities of gypsum to produce a fine powder called Ordinary
Portland Cement (OPC). When mixed with water, sand and stone, it combines slowly with the water to
form a hard mass called concrete.
ACC Limited, one of the top manufacturers of cement has a diverse range of portland cement at an
affordable prices.Visit your nearest ACC Dealership to find out more
Supplementary Cementations Materials (SCM) like silica fumes, meta-kaolin, fly ash, slag are the materials which improve the properties of concrete and enhance its durability, by reducing pore size in concrete through better particle distribution and through increased packing density of the concrete.
Fineness defines the surface area of cement particles present in per unit weight, which implies that
more fineness means more particles in unit weight. This enhances the reaction rate which in turn
will result in faster gain of strength at earlier stages.
ACC, being India’s first cement company, has long been developing products that have higher
durability and strength. Like ACC Gold Water Shield Cement, India’s first water-repellent cement and
ACC Suraksha Power Cement, infused with unique strength multipliers that keep increasing the
strength over time.
Blended cement is obtained by either intergrinding pozzolanic material or slag with clinker along
with Gypsum or by blending ground pozzolana or slag with Portland cement. They are also termed as
composite cements.
ACC has a special blended cement in its vast portfolio, produced by inter-grinding higher strength
Ordinary Portland Cement clinker with high quality processed fly ash at a pocket-friendly price.
Pozzolana combines with lime and alkalies in the cement and when water is mixed forms compounds which contribute to strength, impermeability and sulphate resistance It also contributes to workability, reduced bleeding and controls destructive expansion from alkali-aggregate reaction. Leaching of free lime is also reduced.
When water is mixed with cement, the paste so formed remains pliable and plastic for a short time. During this period it is possible to disturb the paste and remit it without any deleterious effects. As the reaction between water and cement continues, the paste loses its plasticity. This early period in the hardening of cement is referred to as 'setting' of cement. ACC F2R Superfast is a revolutionary cement designed to reduce the construction time by setting fast and providing higher strength. Contact your nearest ACC Dealer to know more.
Initial set is when the cement paste loses its plasticity and stiffens considerably. Final set is the point when the paste hardens and can sustain some minor load. Both are arbitrary points and these are determined by Vicat needle penetration resistance. If you want to speed up the construction process and setting time, use ACC F2R Superfast, a superior cement with superfine quality and superfast setting formula.
Slow or fast setting normally depends on the nature of cement. It could also be due to extraneous factors not related to the cement. The ambient conditions play an important role. In hot weather, the setting is faster, in cold weather, setting is delayed. Some types of salts, chemicals, clay, etc if inadvertently get mixed with the sand, aggregate and water could accelerate or delay the setting of concrete. Ask your nearest ACC Dealer for a super-fast setting cement.
The Bureau of Indian Standards (BIS) has classified OPC in three different grades. The
classification is mainly based on the compressive strength of cement-sand mortar cubes of face area
50 cm2 composed of 1 part of cement to 3 parts of standard sand by weight with a water-cement ratio
arrived at by a specified procedure.
The grades are:
Portland Pozzolana Cement (PPC) is obtained by either intergrinding a pozzolanic material with clinker and gypsum, or by blending ground pozzolana with Portland cement. Nowadays good quality fly ash is available from Thermal Power Plants, which are processed and used in manufacturing of PPC. ACC Fly-ash based PPC is made by intergrinding high strength clinker with specially processed flyash. Contact the ACC Dealer to know the price and many benefits of PPC.
Pozzolana combines with lime and alkali in cement when water is added and forms compounds which
contribute to strength, impermeability and sulphate resistance. It also contributes to workability,
reduced bleeding and controls destructive expansion from alkali-aggregate reaction. It reduces heat
of hydration thereby controlling temperature differentials, which causes thermal strain and
resultant cracking n mass concrete structures like dams.
ACC Fly-ash based PPC easily replaces OPC and provides additional advantages for practically all
types of construction applications - commercial, residential, bungalows, complexes, foundation,
columns, beams, slabs and RCC jobs.
The colour of PPC comes from the colour of the pozzolanic material used. PPC containing fly ash as a pozzolana will invariably be slightly different colour than the OPC.
No. The quality of cement depends upon the raw materials used and the quality control measures adopted during its manufacture, and not on the shade of the cement. The cement gets its colour from the nature and colour of raw materials used, which will be different from factory to factory, and may even differ in the different batches of cement produced in a factory. Further, the colour of the finished concrete is affected also by the colour of the aggregates, and to a lesser extent by the colour of the cement. Preference for any cement on the basis ofcolour alone is technically misplaced. Hence, its wise to always choose quality over price.
Slag is a non-metallic product consisting essentially of glass containing silicates, alumino-silicates of lime and other bases and is obtained as a by-product in the manufacture of pig iron in a blast furnace or electric furnace. Granulated slag is used in the manufacture of Portland Slag Cement (PSC).
PSC is made by inter grinding clinker, granulated blast furnace slag and gypsum, or by blending ground slag with Portland cement.
Slag cement can be used for all plain and reinforced concrete constructions, mass concreting
structures such as dams, reservoirs, swimming pools, river embankments, bridge piers, etc. It is
used with advantage where low heat of hydration and resistance to alkali-silica reaction are
desired, for structures in aggressive environments where chemical and mildly acidic waters are
encountered (where the use of OPC is not recommended), for marine constructions, dykes, wharves, etc
where sulphatic water is encountered. In short, PSC can be used wherever OPC is used.
Visit your nearest ACC Dealership to discover the various PSC options available at an affordable
rate.
Cement which is in the form of a fine powder has a tendency to absorb moisture present in the
atmosphere. When it absorbs moisture it hydrates, and when subsequently used does not contribute to
the strength development. Jute bags (gunny bags) in which cement is bagged are neither airtight nor
damp-proof and do not prevent absorption of moisture. Cement deteriorates in quality on long
storage.
Cement bagged in woven polythene bags or paper bags are not likely to deteriorate to the extent
mentioned above. The loss of strength also depends on the condition of the godown. It is advisable
to use cement within three months of its bagging, or to test the cement for its strength if stored
for longer periods. Hence cement bought first should be used first.
Precautions that must be taken in the storage of Portland cement are given below in a series of DON'Ts.
On the cement bag, week number, month and year of manufacturing are mentioned. Make sure you check them before buying and using cement.
The colour of PPC comes from the colour of the pozzolanic material used. PPC containing fly ash as a pozzolana will invariably be slightly different colour than the OPC.
The colour of PPC comes from the colour of the pozzolanic material used. PPC containing fly ash as a pozzolana will invariably be slightly different colour than the OPC.
