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Moisture measurement in bulk solids including RMC

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Time Domain Refractometry (TDR) is a method used to measure the dielectric constant (water content) of a material.

Time Domain Refractometry (TDR) is a method used to measure the dielectric constant (water content) of a material. Metal conductors or rods are used as wave guides for the transmission of the TDR-signal. The device generates a high-frequency-pulse (up to 1GHz) which propagates along the wave guides at the speed near to light, generating an electromagnetic field around the probe. At the end of the wave guides, the pulse is reflected to its source. The resulting transit time from picoseconds to nanoseconds and dielectric constant provide an accurate measurement of moisture content. The moisture content is calculated inside the device and is available at standard analogue outputs.

IMKO, a German company, which part of the Endress+Hauser Group has developed a patented measuring method called TRIME® TDR method. With this technology it is possible to measure the transit time with a resolution of 3 picoseconds. The TRIME® TDR method has been successfully used more than 30 years in the process industry.

The TRIME® TDR -technique has an ideal measuring frequency between 600MHz and 1.2GHz and the measuring field penetrates deep into the material. The electromagnetic pulses generated in the TRIME device are high enough and constant for good resolution and accuracy of measurement. In addition, disturbing influences such as electrical conductivity have nearly no effect. Precise moisture can be measured in temperatures up to 120°C. TRIME® TDR technology is used in Solitrend product which helps to increase product quality and reduce energy efforts due to precise moisture measurement.

The senor used in Solitrend is in direct contact with the material. Calibration is a simple linear equation. Measurement field adapts itself to the shape of material and is quite large. It is also undisturbed by dripping water, air and dirt. The probes are extremely rugged for exceptionally long operational life. It also replaces time consuming lab analysis and manual sampling with continuous online measurement.

Both In line as well as portable probes measurements are available.

Application

  • The building industry. Moisture measurement in Ready Mix Concrete.
  • In line moisture content measurement in bulk material or goods like wood chips, pellets, animal food etc.
  • The glass and ceramics industry like silica sand, moulding sand, ceramics mass.
  • Food Industry. Malting plants, Corn, Sludge drying, Fluid bed dryers (inlet/outlet).

Limitations of other methods

Capacitance method – This method works with single measuring frequencies between 5-80MHz. The dielectric constant is influenced both by moisture and salinity. It is very difficult to distinguish between the two influences and precise moisture measurements are difficult to achieve.

Microwave method – The frequencies of microwave techniques are generally higher than 2GHz. This technique leads to loss in resolution and accuracy of measurement having negative influence on the readings.

Conductance or Resistance method – This method have very low measuring frequencies of about 4kHz. There is a strong influence of different salinity of the bulk material on the measurement. The difference in salinity is caused by different mineral contents temperature. Another problem of resistance method is the low penetration depth of the measuring field.

Near-Infrared method (NIR)-This method shows a very lower penetration depth and, therefore, considerable influences of material surface and thickness.

Scan the QR code for more information or write to us on info.in.sc@endress.com.

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Concrete

Gautam Adani Inspects Godda 2,300 MW Power Plant

Inspection follows MP request and points to cement plan

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Gautam Adani visited Godda on Sunday to carry out a first inspection of the power plant in the district, where electricity generation of 2,300 megawatts (MW) is being undertaken through five units. The visit involved a walkthrough of production areas and technical installations and included meetings with senior plant executives. The inspection was described by officials as focused on operational readiness and optimisation of output.

Officials said the establishment of the plant followed a request from the local member of parliament, who provided cooperation during project development, and indicated that plans to establish a cement plant in Godda are likely to materialise soon. The electricity produced at the facility is currently being supplied to Bangladesh, and officials confirmed that the possibility of exporting power to other neighbouring countries is under consideration. Company representatives indicated that the project aims to balance regional energy demand with commercial export obligations.

During the review of all units, plant leadership set out steps to accelerate commissioning and enhance maintenance regimes to ensure sustained generation. The commissioning of the power plant has already been credited with contributing significantly to the development of Godda, and the proposed cement plant is expected to add industrial capacity and create large-scale employment in the region. Local authorities are monitoring progress with a view to aligning infrastructure improvements and workforce development.

Stakeholders expect the visit to accelerate operational momentum at the site and to clarify timelines for further investment and local supply arrangements. The inspection was followed by technical briefings and an internal review of safety and environmental practices to support reliable operations. Officials said subsequent measures will focus on connectivity, logistics and community engagement to ensure the project delivers intended economic benefits.

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Concrete

Govt Exempts Tailings Recycling In Mines From Fresh Green Clearance

Move aims to streamline mining waste management

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The central government has exempted tailings recycling in mines from the requirement of a fresh environmental clearance, citing an effort to streamline approvals and promote resource efficiency.

The decision is intended to simplify regulatory procedures for operators seeking to process existing mine waste for recovery of minerals and other materials.

Officials indicated that the move should reduce administrative delays while maintaining compliance with existing safeguards.

Authorities said existing environmental safeguards would continue to apply to recycling operations.

Tailings recycling refers to the recovery of valuable materials from the fine waste generated by mining operations and the subsequent reprocessing of material to reduce the volume stored in tailings facilities.

Advocates argue that recycling can recover metals and minerals, lower the demand for new ore extraction and reduce the footprint of waste storage.

The policy change is expected to encourage the adoption of technologies that convert legacy waste into usable inputs for industry.

The mining industry welcomed the exemption as a way to accelerate projects and improve economics, while environmental groups urged robust conditions to prevent adverse impacts.

Conservation organisations stressed the importance of rigorous monitoring, independent audits and clear standards for waste handling and water management.

Regulators are likely to frame the exemption with specific compliance requirements to balance economic and environmental objectives.

Industry sources indicated that the move could attract investment in processing plants and associated infrastructure.

The change may prompt states and permitting authorities to update their frameworks to reflect the central clearance position and to clarify oversight roles.

Observers noted that effective implementation will depend on transparent reporting, enforcement capacity and investment in rehabilitation of legacy sites.

The long term outcome will hinge on whether recycling reduces the environmental risks associated with tailings while supporting a circular approach in the mining sector.

Stakeholders called for clear timelines for compliance.

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Concrete

Cement Demand Revives As Prices Decline In Q3 FY26

Nuvama reports improved volume growth after price correction

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A report by Nuvama Financial Services (Nuvama) said cement sector demand revived in the third quarter of fiscal year twenty twenty six as prices declined, supporting volume growth across regions. The note indicated that sequential price correction helped replenish demand that had been subdued by elevated pricing earlier in the year. Nuvama quantified the price decline as a sequential correction that varied across states and segments, facilitating restocking by merchants and traders.

The report suggested that improved affordability after the price correction encouraged housing and infrastructure activity, with developers and contractors adjusting procurement plans. It added that regional dynamics varied, with some markets showing faster recovery while others remained reliant on seasonal construction cycles. Housing demand was driven by both affordable and mid segment projects, while infrastructure segment recovery was contingent on timely execution of public works.

Analysts at Nuvama assessed that the price moderation eased inventory pressures for manufacturers and distributors and supported margin stabilisation at several producers. Demand improvement was visible in both urban and rural segments, although the pace of recovery differed by state and trade channel. Producers were seen balancing price realisations with volume targets and managing input cost volatility through operational efficiencies.

The report recommended that investors monitor volumes and realisations closely as market equilibrium emerges in the coming quarters, noting that sustainability of recovery would depend on monsoon patterns and government infrastructure outlays. Overall, the assessment pointed to a cautiously optimistic outlook for the cement industry as price correction translated into tangible volume gains. Market participants were advised to track early signs of demand broadening beyond core construction hubs to assess the depth of the rebound.

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