Is there any study that shows calcite precipitated by bacteria in self-healing concrete lead to micro-cracking?

Calcium carbonate precipitated by bacterial metabolism is the sealing agent for cracks in self-healing concrete. However, if there is no crack, would the calcite generated by bacteria lead to...

08 September 2017 5,511 1 View

Is there any published data on relationship between adiabatic temperature rise during cement hydration and heat of hydration?

I am looking for an equation or model that draws relationship between temperature rise of cement paste and heat of hydration of portland cement.

04 May 2017 5,320 3 View

Is there any data on water absorption capacity of biochar in alkaline solution?

Will water retention capacity of biochar be affected if highly alkaline water is used (pH>12) as absorbate instead of normal water?

01 February 2017 4,137 3 View

Effect of carbon particles (30-80 micron) on internal temperature of concrete during hydration?

If I mix carbon particles ( size 30-80 micron) in cement , what will be the effect on internal concrete temperature during first 24 hours of hydration ?

10 November 2016 7,202 3 View

What kind of carbonate polymorphs may be present in saw dust derived biochar prepared at 300 degrees?

I have prepared biochar from mixed wood saw dust at 300 degrees. XRD pattern show sharp peaks at 2-theta = 37.8 , 44.06, 64.38 and 77.5. Does it say anything about presence of calcium carbonate...

10 November 2016 4,264 9 View

How does cohesion between a carbon based admixture and cement/sand particles affect setting time of mortar?

The carbon rich admixture is hydrophilic. By absorption of free water the admixture can reduce initial setting time but how does the bonding between this admixture and cement affect setting time?

10 November 2016 3,560 2 View

Are there studies on relation between hydration and microstructure of mortar/cement paste and pH of mortar/concrete?

Specifically, I would like to ask whether some research have explored the rate of hydration, strength development and hydration products when the pH of concrete or mortar drop below 12 or even 10 ?

07 August 2016 9,836 0 View

Is there any research that quantitatively states the impact of microfibers on rate cement hydration ?

11 December 2015 4,738 1 View

How two melting peaks in DSC of polypropylene can be merged into one crystallization peak?

The figure shows DSC cooling (blue) and 2nd heating (green) curves (step: 10 K/min) for a commercial sample supplied as Atactic Polypropylene (APP). The heating curve illustrates two major...

03 March 2021 5,857 3 View

What is the procedure to determine the permeability of concrete?

can anyone help me in this, it will help me with my research work

01 March 2021 834 3 View

Which one is easier and better at modeling slender masonry structures? ANSYS or ABAQUS?

I need to model masonry and reinforced concrete minarets for my MSc thesis. Which one is easier and better at modeling slender masonry structures? ANSYS or ABAQUS? (Or any other program for just...

01 March 2021 736 3 View

Glass fiber content in a gypsum board ?

Any idea on how to get the volumic ratio of glass fiber in a gypsum board ? Thank you for your help !

01 March 2021 2,501 3 View

Apart from Nanosilica and CNT's what are the other nanomaterials readily available to use in concrete mixture?

Nanotechnology in concrete materials

01 March 2021 3,379 3 View

Concrete compressive strength databases?

I am looking for datasets similar to this one: http://archive.ics.uci.edu/ml/datasets/Concrete+Compressive+Strength I am looking for concretes with different types of aggregates (Recycled,...

27 February 2021 6,801 3 View

LEDs on Vis Light photo degradation of MB water sol via N doped TiO2 in a mini flume?

Good day to all, I have no experience with light emitting diodes. I am building a glass mini flume to demonstrate the photo degradation of Methylene Blue in water running over self cleaning...

26 February 2021 4,026 5 View

How can I set up a good fit SEM model in AMOS?

I am trying to make an SEM model in AMOS for my dissertation but having some trouble with getting a good fit. I am looking for relationships between self-efficacy reported on a Likert scale and...

26 February 2021 8,642 4 View

What is the best way to calculate the angles of twist for concrete columns subjected to torsional moment using finite element software?

In Finite element software like ANSYS , there is difficulty in obtaining direct results of twisting of concrete members because SOLID65 which is the unique element designed to represent concrete...

26 February 2021 3,806 2 View

Compute for the total volume of concrete needed for the concrete pouring of the foundation including its column up to NGL only as shown in the plan?

Looking for the quantity of cement, sand, and gravel of footings and columns. Thank you!

25 February 2021 3,092 2 View