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Pumice Stone Benefits

Company Name : UD.SWOTS POTS

Address : Arya Banjar Getas Street, Gang Lele, Green Palm Residence, Number B5, Mataram City, Nusa Tenggara Barat Province, Indonesia, Post Code: 83115

Phone / Whatsapp : +6287865026222

Lombok Pumice Stone Mining Indonesia

Pumice Stone Supplier From Indonesia

Pumice Stone Benefits

Pumice is used more in the construction sector than in the industrial sector.

Benefits of Pumice in the Construction Sector

In the construction sector, pumice is widely used for the manufacture of lightweight aggregates and lightweight aggregates because it has very favorable characteristics; that is light and soundproof (high in-sulation). The specific weight of pumice of 650 kg/cm3 is comparable to that of ordinary brick weighing 1,800 – 2,000 kg/cm3. From pumice, it is easier to make large blocks, thereby reducing plastering. Another advantage of using pumice in the manufacture of aggregates is that it is resistant to fire, condensation, mildew and heat, and is suitable for acoustics.

Specifications of pumice in the manufacture of aggregates and lightweight aggregate concrete are as follows:

  • Light aggregate (BS 3797, 1964):
  • SO3 : max. 1%
  • LOI (loss on ignition): max. 4% Bulk weight:
  • Coarse details: max. 0.96 ton/m3
  • Fine grain : max. 1.20 ton/m3
  • Lightweight aggregate concrete (BS 2028, 1364, 1968)
  • Soundproof (3 inch block): 44.3 db.
  • Dry fill weight : 0.88 ton/m3
  • Calorific value: 1.0 cal
  • Fire resistance: up to 6 hours
  • Dry shrinkage (drying shrinkage): 0.04%
  • Grain size: 1 – 9 cm

In addition to the above mentioned uses, in the construction sector, pumice is used for road foundations, acoustic tile raw materials, fire-resistant materials and others.

Benefits of Pumice in the Industrial Sector

In the industrial sector, pumice is used as a filler, polishing, cleaner, stonewashing, abrasive, high temperature insulator and others. The user industry, function, and degree of pumice grain size can be seen in Table 1.

Table 1. Uses of Pumice in the Industrial Sector

  • Industry – Uses – Grain Size – Degree
  • Coarse Nonskid Coating Paint
  • Rough acoustic insulation paint
  • Fine-coarse texture paint filler
  • Flattening agents Very smooth
  • Chemical Coarse Filtration Media
  • Coarse chemical carrier
  • Metal and plastic Sulfur match trigger Fine-coarse
  • Very fine cleaning and polishing
  • Vibratory and barrel finishing Very fine-medium
  • Medium pressure blasting
  • Smooth Electro-plating
  • Glass/glass cleaner Very fine
  • Hand Belt Powder Compounder Medium
  • Glass/glass cleaner Very smooth
  • Cosmetics and toothpaste Fine teeth polishes and fillings
  • Skin evener Liquid powder
  • Rubber Eraser Medium
  • Very fine mold material
  • Skin For Medium Shiny
  • Glass and mirror Smooth TV tube processing
  • Smooth TV tube glass polishing and polishing
  • Bevel finishing Very smooth
  • Glass scrap eraser Very fine
  • Electronics Circuit board cleaner Very fine
  • Pottery Fine Filling
  • Description : Coarse = 8 – 30 mesh; medium = 30 – 100 mesh; fine = 100 – 200 mesh; very fine > 200 mesh Source : Industrial Minerals, Bulletin, 1990

Some examples of specifications for pumice used in the industrial sector are:

For pigments as follows :

  • Glow : max. 5%
  • Flying substance : max. 1%
  • Pass the 300 m sieve : min. 70% Pass 150 m filter : max 30%

For pottery:

  • SiO2 : 69.80%
  • Al2O3 : 17.70%
  • Fe2O3 : 1.58%
  • MgO : 0.53%
  • CaO : 1.49%
  • Na2O : 2.45%
  • K2O : 4.17%
  • H2O : 2.04%
  • Water content : 21%
  • Flexural strength : 31.89 kg/cm2 Water absorption : 16.66% Volume weight : 1.18 gr/cm2 Plasticity : plastic
  • Grain size: 15 – 150 mesh


The composition of the material for this pottery consists of pumice, clay, and lime in a ratio of 35%, 60% and 5%, respectively. The use of this pumice stone, intended to reduce weight and improve the quality of pottery.

Besides in the construction and industrial sectors, pumice is also used in the agricultural sector, namely as an addictive material and as a substitute for agricultural land.

Pumice Spesification

Some specifications of pumice traded by several manufacturers in the world are as follows:

Italian Type

  • SiO2: 70.90%
  • Al2O3: 12.76%
  • Fe2O3: 1.75%
  • Pass filter
  • 0.5 inch : 100%
  • inch: 95%
  • inch: 67%
  • inch: 51%
  • Impurities (clay, salt and ash): 32.8% Carbonate: 0%
  • Bulk weight: 480 kg/cm3 Specific gravity: 0.80
  • Water infiltration: 44.0% dry weight
  • Impact aggregate value (0.5 – 3/8 inch): 56.0% Aggregate abrasion value (0.5 – 3/8 inch): 212.0 Falkiness index: 5.4
  • Elongation index: 3.6

Turkish Type

  • SiO2: 67.80% – 72.50%
  • Al2O3: 12.59% – 14.00%
  • Fe2O3: 0.90% – 3.00%
  • MgO: 0.13% – 0.26%
  • CaO: 0.80% – 1.50%
  • Na2O: 3.40% – 3.62%
  • K2O: 4.30% – 4.71%
  • Incandescent: 4% – 5%
  • Greek Type
  • SiO2: 70.55%
  • Al2O3: 12.24%
  • Fe2O3: 0.89%
  • MgO: 0.10%
  • CaO: 2.36%
  • Na2O: 3.49%
  • K2O: 4.21%
  • SO3: 0.03%
  • Other elements: 0.62%
  • Glow loss: 5.51%
  • Dry bulk density: 0.6 – 0.72 ton/m3 Grain size: s.d. 8 mm
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