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

What are the explanations for balling of polypropylene fibers in mortar/concrete?

Any studies that discuss the possible reasons for this balling effect?

11 December 2016 9,046 0 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

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

Chlorinated organic formation in odor control scrubbers using hypochlorite?

I'm involved in a study of odor control technologies for municipal wastewater treatment plant. One of the control options involves a chemical 2-stage (acid/alkaline) packed bed scrubber. The...

03 March 2021 3,661 2 View

What solvent can I used for Paal Knorr reaction between 6-amino hexanoic acid and 2.5 hexanedione?

I am try to make the Paal Knorr reaction between 2.5 hexnedione and 6-amino hexanoic acid, my problem is type of solvent to use, because 6-hexaminohexanoic acid is soluble in water but I am not...

02 March 2021 4,443 2 View