Challenges in Repair of 100 + Years Old Concrete Structure

  • September 19, 2018
  • 6:15 PM - 9:00 PM
  • Scott’s, Jack London Square #2, Broadway Oakland, CA 94607

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Challenges in Repair of 100 + Years Old Concrete Structure

**Please note new location**

Scott’s, Jack London Square #2, Broadway Oakland, CA 94607



Speaker: Ashok Kakade, P.E., Concrete Science, Inc., Hayward, CA


Wednesday, September 19, 2018, 6:15 p.m.

NEW LOCATION: Scott’s, Jack London Square #2, Broadway Oakland, CA 94607

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Meeting Agenda: 

6:15 p.m. - Pre-registration/bar opens

6:45 p.m. - Bell rings

7:00 p.m. - Dinner

7:30 p.m. - Presentation begins


Dinner Meeting Sponsor



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About this Presentation: 

This presentation will discuss challenges and repair of a 100 + years old historic, single-story government building, The Hall of Records, in Bakersfield, California. For our work, we received an award from American Concrete Institute and International Concrete Repair Institute.

Original construction was completed in 1909 and the $55,000 building opened its doors to the heart of the Civic Center portion of downtown Bakersfield on the corner of Chester and Truxtun. When it celebrated its centennial in 2009, it remained the longest continuously used government building in Kern County, housing approximately 9.2 million records. During its long life, the Hall of Records has served an ever-increasing population, from its humble beginnings serving a population of 37,000 to Kern County’s current population of over 880,000 people. Renovations to the structure occurred in 1939 and again in 1988, along with a seismic retrofit. These changes highlighted the structure’s architectural transformation from its original Beaux Arts style to a PWA Modern style.




STRUCTURE CHARACTERISTICS

The entirely cast-in-place concrete building’s footprint is approximately 9,300 ft2 with a partial finished basement. The 4” roof slab is supported by a network of pan joist beams and girders. The 4” floor slab is covered with a 1 ½” non-structural topping and supported by 8” x 21” pan joist beams spanning from the perimeter to interior 12” x 40” girders on a 27’ grid. The floor and roof beams are supported by interior columns with pad footings and perimeter walls or pilasters on continuous footings. A combination of smooth shear dowels and square, twisted flexural reinforcing was noted throughout.


PROBLEMS THAT PROMPTED REPAIR

Signs of concrete deterioration in the approximately 9,000 ft2 unfinished crawl space were noted during the 1988 retrofit, and in 2013 investigations showed that several columns, pilasters, and beams showed signs of severe spalling, delamination, corrosion, and cracking. A more detailed investigation was requested to determine any additional defects in the crawl space concrete and the cause of the reinforcement corrosion.


In addition, the presentation will include:

1. INSPECTION / EVALUATION METHODS

2. TEST RESULTS

3. CAUSES OF DETERIORATION

4. REPAIR SYSTEM SELECTION

5. SITE PREPARATION / UNFORESEEN CONDITIONS

6. REPAIR PROCESS EXECUTION


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About the Speaker:


Mr. Kakade has over 35 years of experience in construction, investigation, and rehabilitation of concrete and masonry structures. He has constructed reinforced concrete buildings, retaining walls, foundations, and pavements. He has investigated foundations, pavements, warehouse floors, swimming pools, marine structures, commercial and industrial buildings, high rise residential buildings, parking structures, tunnels, dams and others concrete structures.

Mr. Kakade has taught a Concrete Technology course to Engineers, Architects, & Contractors at the UC Berkeley and UC Davis, Engineering Extensions. Mr. Kakade has worked on developing, testing and modifying concrete mix designs using various chemicals and admixtures. Mr. Kakade was trained in Germany in the use of concrete admixtures, sealants, waterproofing, epoxy, polyurethane injection materials, and polymer modified cementitious repair materials. He has conducted tests on hardened regular weight, light weight, gypsum, colored & polymer-based concretes.

Mr. Kakade is trained in cement & concrete chemistry and has worked on projects having distresses due to workmanship, corrosion of metal, fire related distress, sulfates, cracking, discoloration, concrete moisture related flooring distresses, alkali-silica reactivity, and other design, material, and construction related defects in concrete, stucco, and masonry structures. His work determined the causes of distress to structures and designed advanced repairs including corrosion protection systems and moisture mitigation systems. Mr. Kakade performs construction management & quality assurance services for the repair projects.

Mr. Kakade has testified in numerous Arbitrations, Mediations, and Superior Courts as an expert.


**Please note new location**

Scott’s, Jack London Square #2, Broadway Oakland, CA 94607

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Menu 

Grilled Salmon Alla Bella dipped in an Egg and Parmesan Batter with a Lemon-Caper Butter Sauce

Parmesan Crusted Chicken with Leek and Lemon Cream Sauce

Vegetarian Option - Pasta Primavera



Cancellation requests submitted in writing on or before the Friday before our Dinner Meeting will be honored. No cancellations after that date. Submit cancellation requests via email to info@connerlyandassociates.com.

Please contact the association office for any questions.