bq construction in Iran

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Established in Abqaiq in Saudi Arabia in the 1970s and later moving to Dhahran in 2004, Bin Quraya (BQ) is and has always been about delivering the best ...

Development of an economical radon-resistant …

2009-1-1 · Radon is believed to be an important risk factor for lung cancer. Radon levels in some regions of Ramsar, a city in northern Iran, are up to 3700 Bq/m³. On the other hand, in the hot springs of Mahallat, in the central part of Iran, the indoor mean radon concentration in air is as high as 480 Bq/m³. In order to develop an economical radon-resistant construction technique, …

A review on natural background radiation

2013-7-30 · A survey carried out in Iran on natural radioactivity in buildings examined five popular construction materials, namely cement, gypsum, cement blocks, brick, and gravel. The survey results showed that cement specimens had maximum values of the mean 226 Ra and 232 Th congregation, whereas the lowest value for average congregation of these two ...

Natural radioactivity in granite stones used as building …

2011-6-17 · INTRODUCTION. The most important source of external radiation exposure in buildings is caused by the gamma rays emitted from members of the uranium and thorium decay chains and 40 K occurring naturally in building materials () is an established fact that all the construction materials contain trace amounts of natural radioactivity ().Knowledge of …

BILLS OF QUANTITIES

BQ are also widely used throughout t he Middle East ex cept in Iran and Iraq. Bahrain, Egypt, Jordan, UAE, Qatar, ... 2008 Generally as shown in Table 1, …

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Natural radioactivity and radiological risks of common …

A radiological survey has conducted to monitor radioactivity of most common building materials in Semnan Province, Iran, and assess the radiation risk. Activity concentrations of 226 Ra, 232 Th, and 40 K were measured in 29 samples including nine commonly used building materials that were collected from local suppliers and manufacturers, using ...

(PDF) Radioactivity in building materials in Iraq

The concentration of radium-226, the parent of radon, in building materials used in Iraq was found to be ranged between below detection limit (0.5 Bq/kg) to 223.7Bq/kg [5]. This wide range of ...

The natural radioactivity in the bricks used for the …

2006-11-1 · The natural radioactivity in the bricks used for the construction of the dwelling in Tehran areas of Iran. ... and (40) K were measured in all brick samples, and results ranged from minimum values of 26, 24, and 524 Bq kg(-1) to maximum values of 38, 36, and 820 Bq kg(-1) with mean values of 33, 30, and 700 Bq kg(-1),respectively. In general ...

Natural radioactivity and radiological risks of common …

2021-8-9 · The activity concentration of radionuclides (Bq kg−1)cal-culated using following equation (Shahrokhi et al. 2021): Ai ¼ 1000N TcPγεMe−λt ð1Þ where Ai is activity concentration of specific radionuclide in time of sampling (Bq kg-1), N denotes the net count rate of photopeak, Tc represents the live counting time (second), Pγ