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Concrete

Assessment of structures

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All civil engineering structures are initially designed depending on certain design criteria, such as design loads, allowable stresses etc. But, damage due to an extreme event is always possible in a structure during its design life. Sometimes, undetected and un-repaired damage may lead to structural failure demanding costly repair and a huge loss of lives. Therefore, the problem of maintenance and repair of existing engineering structures involves damage detection at an early stage.

For massive structures like bridges, dams, flyover, ROB, RUB, chemical plants, thermal and nuclear plants, silos, pre heater towers, chimneys, etc., which were constructed some 20-40 years ago, it is necessary to test its functionality under the present load situation and quantify damage if any. Since it involves huge expenditure to demolish and reconstruct them, it is important to evaluate the residual life-RLA (residual life analysis) of these structures.

Performing NDT of concrete structures, which is a basis for the evaluation of RLA/remnant life analysis ??RLA studies. Many methods are traditionally used for flaw characterisation and measurement of residual stress. Combining these inputs many parameters, including mechanical properties, factor of safety in design, conservative operation of unit, inaccuracy in data extrapolation, overestimation of corrosion effects, etc., would be assessed.

Damage Detection and Condition Assessment of Civil Structures

In the assessment of existing structures, engineers are increasingly faced with not only the challenges of early detection of damage, but also the evaluation of structure performance and behavior under damage, and economical and efficient retrofitting of the damaged components commonly found in older structures. In order to maintain the safety and integrity of structures, research on the damage mechanism, assessment of structure performance in damaged status, and innovative technologies and materials to rehabilitate, repair, and retrofit structures are of great significance.

Retrofitting of a cement Plant Preheater Tower

Inspection by plant personnel revealed cracking in the concrete frame of a 326-ft-tall, 7-level preheater tower. Onsite plant engineers deemed the cracking significant, especially since the structure supports critical manufacturing process equipment. A structural engineering consulting firm was retained to evaluate the extent of the problem and formulate a repair plan on a fast-track basis. The firm mobilised at the site in less than 24 hours and performed an initial structural safety assessment. A comprehensive structural evaluation indicated that the structure required strengthening. Restoration consultants were engaged to assist locally with engineering and construction administration.

A specialty repair contractor also was engaged to review the constructability of several alternate repair schemes and maintain the fast-track schedule. After considering structural capacity and serviceability requirements, durability issues, the high-temperature operating environment, constructability, and an aggressive construction schedule, the team recommended a retrofit consisting of bonded post-tensioning within internal holes drilled in the beams. This solution was quite extraordinary, as it required precision-drilling horizontal holes up to 87 feet long in the beams of the elevated frame structure, without cutting existing embedded reinforcement.

Nondestructive impulse radar testing was used to locate existing embedded reinforcing steel, as well as to monitor the drilled holes’ trajectory. This process helped ensure proper hole alignment and prevent damage to embedded steel. The cored holes served as post-tensioning ducts. The repairs were executed on a fast track basis and under challenging circumstances, which included working high on the exposed structure through a cold winter with severe wind conditions. The unique retrofit resulted in a structure that is stronger, more serviceable, and more durable than the original tower. The project represented an exceptional team effort, and its success is attributable to the leadership of the owner and client, the ingenuity of the engineering team, and the resourcefulness of the contractor.

Case study authored by: Kolf, Peter R, Oesterle, Ralph G

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Concrete

Dalmia Acquires Five Point Two MnTPA Cement Assets in Central Region

Acquisition adds capacity, power and rail access

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Dalmia Cement (Bharat) Limited (DCBL) executed a business transfer agreement on 21 May 2026 to acquire a cement undertaking from Jaiprakash Associates Limited (JAL) and Adani Infra (India) Limited. The assets include plants at Rewa in Madhya Pradesh and Churk, Chunar and Sadwa in Uttar Pradesh with five point two million tonnes per annum (mn tpa) cement capacity and three point three mn tpa clinker capacity, plus 99 megawatt (MW) thermal power and railway sidings. The transaction carries an enterprise value of Rs 28.5 billion (bn).

DCBL, a wholly owned subsidiary of Dalmia Bharat Limited (DBL), will see cement capacity rise to 54.7 mn tpa on completion. Ongoing expansions at Belgaum, Pune and Kadapa are expected to raise capacity to 66.7 mn tpa by the second to third quarter of fiscal 2028. The company said the transaction would be consummated within two weeks.

The deal follows a framework signed in December 2022 to settle long running disputes with JAL, including a long term clinker supply arrangement. Completion was delayed when JAL entered insolvency and the earlier sale did not finalise. Following approval of a resolution plan under the Insolvency and Bankruptcy Code, DCBL executed a fresh business transfer agreement to resolve pending legal and arbitral matters.

Company statements described the acquisition as strategic, accelerating access to central markets compared with a greenfield route and offering scope for expansion through debottlenecking and brownfield investment. Proximity to the company’s captive mines and established vendor relationships should support faster ramp up. The assets should augment EBITDA delivery and enhance returns by enabling entry into newer markets with relatively better prices.

Senior executives said the addition aligned with a long term plan to build a pan India presence and would provide a head start in central markets. They noted that familiarity with the plants under earlier tolling arrangements offers operational insight and strengthens channel relationships, supporting quicker market entry. Management expressed confidence that the assets’ expansion potential would generate value for stakeholders.

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Concrete

Ramco Cements Reports FY26 Revenue Growth And Higher Profit

Net debt reduced as exceptional items boost FY26 earnings

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Ramco Cements reported standalone audited results for FY26 with net revenue of Rs 90,560 million (mn) and profit after tax of Rs 6,940 mn. EBIDTA rose to Rs 14,820 mn and blended EBIDTA per tonne was Rs 788 on a two per cent volume rise to 18.81 million (mn) tonne (t). Cement revenue increased by five per cent and construction chemicals revenue rose by 66 per cent.

Raw material cost per tonne rose to Rs 1,023 from Rs 956 mainly due to a mineral bearing land tax of Rs 160 per t in Tamil Nadu, adding about Rs 86 per t. Power and fuel cost per tonne fell to Rs 1,098 from Rs 1,123 with petcoke mix down to 47 per cent and green power up to 40 per cent.

Profit before tax after exceptional items was Rs 8,790 mn. Net exceptional items were Rs 5,530 mn, including Rs 5,740 mn from sale of surplus land and Rs 200 mn of past service cost. The company monetised Rs 10,980 mn from non core asset sales over the past two years and recorded capex of Rs 9,970 mn, with guidance of Rs 8,000 mn for FY27.

Net debt fell by Rs 8,170 mn to Rs 36,640 mn at 31 March 2026 and cost of debt eased to 7.29 per cent, reducing net debt to EBIDTA to 2.47 times. Management indicated the full impact of higher fuel costs is expected from Q2 FY27, while packing and diesel cost increases will be visible in Q1 FY27. The board has proposed a dividend of Rs two point five zero per equity share and the company flagged risks from elevated fuel and logistics costs, commodity volatility and competitive pricing.

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Concrete

Dalmia Cement to Acquire 5.2 MnTPA Capacity

Deal covers cement assets in Madhya Pradesh and Uttar Pradesh

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Dalmia Cement (Bharat), a wholly owned subsidiary of Dalmia Bharat, has executed a Business Transfer Agreement with Jaiprakash Associates and Adani Infra (India) to acquire cement assets with 5.2 MnTPA capacity in the Central region.

The acquisition covers cement plants located at Rewa in Madhya Pradesh, and Churk, Chunar and Sadwa in Uttar Pradesh. The assets include 5.2 MnTPA cement capacity, 3.3 MnTPA clinker capacity, 99 MW thermal power capacity, railway sidings at Rewa and Chunar, and a common railway siding at Churk. The enterprise value of the transaction is Rs 28.5 billion.

Following completion of the transaction, Dalmia Bharat’s cement capacity will increase to 54.7 MnTPA. Its ongoing expansion projects at Belgaum, Pune and Kadapa are expected to further raise capacity to 66.7 MnTPA by the second or third quarter of FY28. The transaction is expected to be completed within two weeks.

Dalmia Cement had entered into a framework agreement with Jaiprakash Associates in December 2022 for the sale of business assets and related agreements, including a business transfer agreement and cement sale purchase agreement. The agreements were intended to settle disputes between the parties, including those under the long-term clinker supply agreement. However, the transaction could not be completed after Jaiprakash Associates was admitted to insolvency.

Following approval of the Adani Group’s resolution plan for Jaiprakash Associates under the Insolvency and Bankruptcy Code, Dalmia Cement requested that the earlier agreement be considered to settle pending disputes. The company has now executed a fresh Business Transfer Agreement with Jaiprakash Associates and Adani Infra (India) for the cement undertaking.

The acquisition supports Dalmia Bharat’s strategy to become a pan-India cement player and provides faster access to Central markets compared to a greenfield project. The assets also offer expansion potential through debottlenecking and brownfield development.

Puneet Dalmia, Managing Director and CEO, Dalmia Bharat, said the assets are a strong strategic fit and will help the company serve high-potential markets in the Central region. He added that the expansion potential of the assets and their proximity to Dalmia’s captive mines could help create a future capacity hub.

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