About Silicawhite


“SILICA WHITE” is made from natural raw material which main component is SiO2 through crushing process into very fine particles, smaller than one third of main cement particles. Containing amorphous SiO2, it has very high pozzolantic activity to facilitate good performances for achieving concrete with improved strength, water tightness, improved resistance to salt and chemical attack, improved stability against freeze-thaw problem, reduced efflorescence and bleeding. One of the special features is its white color.

“SILICA WHITE” can be used as a replacement of a part of cement but it is usually added on to the mixed concrete materials. Because “SILICA WHITE” is very fine powder, it fills the voids of cement without increasing total volume of concrete and performs the required slump and air volume. Thanks to its better bleeding and increased viscosity of concrete, the surface of finished concrete is smooth, shiny, water-repellant, even-collared and good-looking. Many companies have appreciated our “SILICA WHITE” for its performance to make water-tight, economical, durable and beautiful white concrete, and adopted it to lots of their projects.



Trademark Registration. No.4099410
Trademark Registration. No.4322465
Trademark Registration. No.4406736


Kama City Hall

One city and three towns namely Yamada-city, Inatsuki-town, Usui-town and Kaho-town became “Kama city” in 2006 by municipal merger in order to realize unique and energetic community and to create a comprehensive future plan with strengthened urban infrastructure.

In the year 2011 “A special investigative committee regarding a new city hall” was formed. In 2012 after 7 deliberations the location of the new city hall was decided based on an approved bill submitted by city council members.

0n 14th of April 2016 a strong strike-slip fault earthquake of magnitude 6.5 with its seismic center in Kumamoto prefecture attacked Kyushu island. The maximum 7 on the seven-point Japan scale was observed in Mashiki town, Kumamoto and it hit from Kyushu to Chubu district. The first earthquake in Kumamoto area was followed by many quakes which hit extended area of Kumamto prefecture and Oita prefecture.

The new city hall has not only aseismic performance and fireproof performance but also enough space as a disaster protection and reconstruction base with headquarter function. In order to avoid traffic confusion in the event of a natural disaster, better access to the city hall for example by use of surrounding roads was well studied and the hall can fulfill a role to ensure the public security and safety.

It was decided to use high strength concrete for the structure of the new city hall. In order to perform the compressive strength of 50N/mm2, the concrete needed to be recognized by the minister under the building standards law and the concrete mixed with concrete special admixture “SILICA WHITE” was certified by the minister for the project.

The construction work of the new city hall is now actively under way.

Mito City Hall

The new city hall of Mito city was opened in January 2019. The plan was laid out based on careful researches such as the result of “questionnaire survey of 10,000 Mito citizens on the future vision of Mito city” after the great east Japan earthquake, opinions of citizens’ investigation committee on the improvement works of the city hall, grasping works of citizens’ needs and discussions at the special investigation committee of the city council.

One of the important duties of the city hall has been the safety performance as a comprehensive disaster prevention center and in addition to the earthquake resistance capacity the hall guarantees the maximum safety structurally and technically being equipped with sufficient safety control system and independence. The city hall gives services jointly with the fire-fighting head office and the water service office. It has disaster control center aiming at safe city hall as a comprehensive disaster protection center. In order to enhance the structural earthquake resistance, “SILICA WHITE” was adopted for this building.